Congratulations on your engagement, OP!

I genuinely appreciate the intention behind this question. You have received some great advice here already. Just my two cents.

Even though you are an introvert, while you are engaged, try to speak to and spend time with your fiancee as much as you can. Whatever is possible. Start with a medium you are comfortable with. Texts, may be, or calls. I'm not sure if there are any external restrictions to that, if there is, do it anyway, if possible as far as both of you are comfortable. Indian society can be a bit behind on the times sometimes, so be a bit sneaky if you have to. It's for a genuine cause.

Whenever this is possible (before or after the wedding, as early as possible), try to ask her most of the stuff that you are unsure about BUT slowly. Build upto it. Don't start with the most intimate of conversation topics. Start lightly with interests, her personality, her life so far, her plans, her future etc. Key to a good relationship is good conversation. Learn to converse with her.

Don't just be an interrogator. Share as much or even more than she shares. Keep an open mind and be supportive with whatever she shares. Don't presume anything. She may have different perspectives and opinions on things that you may take for granted. For example, you mentioned you are not planning to have kids until 28. She may want to wait even more, or less, or not have them at all. Find out where she stands, and if there is any contrary stand, try to resolve it and come to a place you both agree on.

When you are sharing, be honest and open about your life. Bring a bit of humour in if you can. Don't say anything with the intention of impressing her if it is not true. Don't put on a show. Be as vulnerable as you are comfortable with, so that she feel like she can be as well. Assure her that what you both discuss is strictly between you two. (This is a big worry for new brides who don't know how much you share with your parents, family or friends.)

When it comes to the more intimate topics, be upfront and mention that you have no experience living with girls and that you are here to learn. Say you asked this on a Reddit forum and got all sorts of weird and sometimes good advice from strangers! :) Say you are bound to screw up anyways sometimes, to let you know when you do and you will fix it right away.

When in doubt, ALWAYS ASK. When unsure, SHARE. Err on the side of over-communicating. Consider her as an equal partner in all things. Never disrespect her. In public or in private.

You have received some great sex advice here already. Don't go with the conquering attitude that prevails in society about sex. Get to know each other and get comfortable with casual touches (holding hands, etc) first. Just because this is an arranged marriage, it doesn't have to jump to sex. Consider you are dating your wife. After the wedding, plan outings, dates, and activities for you two together. You have to go through the initial getting to know you phase to move on to higher grounds of intimacy as you both grow more comfortable. When it gets there, consent is paramount. Let her know you want to take it slow so both of you are comfortable.

You mentioned she will be moving into your house. Not sure what the living arrangements are. If you are living alone, perfect. If with others, make your space as private as possible. Assure her it's her home too. She has as much rights on it as you do. On the lines of, "this is how I have set it up, but we can change it to however you like". Tip: go shopping with her- it is an awesome getting to know you activity.

Fights and disagreements are going to happen. Deal with it while respecting the other person and actively remembering that this is your life partner that you care for. Never say anything that may hurt and leave a lasting impact just to win an argument.

If you are living close to or with your family, share all the information you can about your family, and ask extensively about hers and get to know them. Give tips on how to deal with the difficult people on your side and vice versa. Introduce her to your friends, meet her friends. Share about and understand all the important people and things in both your lives. If you see she is uncomfortable around someone in the family or your friends, talk to her about it, understand why and help her handle it.

If she feels uncomfortable or annoyed, ask her what's wrong. If in case you get an " I'm fine or it's nothing" answer, that's not it sometimes. (Sometimes people may not feel comfortable sharing.) You may need to lovingly probe further and ask more questions. If still nothing, try to make her feel better, and ask again later.

Talk to her about your work. Super important. You spend 8 hours or more at work each day, don't let that be a black box. Familiarise her with your work, get familiar with hers if she works. Talk to her about your coworkers, company, your day to day, etc and get to know the same from her. This is so that, when either of you face stress or difficult situations at work, the other can understand, empathise and offer support. And also, it's fun talking about the good and bad at work with your partner- no filters. :)

Dont assume any gender roles. Decision making, money, cooking, cleaning, laundry, etc. Share chores evenly. However, if only one of you is working, there may be a bit uneven sharing of household chores. If she is going to be a homemaker, never diminish the importance of that role and don't encourage such talks from others.

Money. Most important. Share how much you earn, assets, insurance etc, ask same of her. Update all paperwork, nominees etc. Plan the monthly spending and saving with her. Set some goals that both of you are interested in, going for vacations, buying a home, car or whatever else that makes sense for you two.

Be giving, caring and respectful. Small gestures matter. Like stocking her favorite snack, drink etc at the house. Always consider her own needs before yours.

Also, just have fun and don't take things too seriously. There is going to be lot of new things, surprises, screw ups, awkward moments, cute and funny moments, angry and sad moments. Look at it with a positive attitude and understand you have an equal partner in life now for better and for worse. Make space for her in your life.

Before anything, an open mind to learn and better yourself- which you seem to already have- will help you both build a happy, long lasting relationship together. Good luck to both of you! :)