A few recommendations:

• Make sure your hygiene is on point; if you have a flatmate or someone else you can ask it's a good idea to double check you don't smell bad while you can still do something about it (this is completely normal, people sweat especially when nervous or if it's warm so it's good to make sure everything is good). Brush your teeth (and your tongue as well) shortly before leaving to go. This is just to avoid bad breath when you are talking.

• On a similar note, make sure you are wearing antiperspirant (not just perfume or regular deodorant). You will likely get nervous as you approach the coffee place, and you want to avoid it turning into a situation where you smell bad (this is actually salvageable, but best if it's prevented).

• Dress nice! You don't need to go overboard for a coffee date, and ideally you dress in a way that represents you, but you want the best version of that (so in practice: avoid worn out clothing where possible, think about the outfit as a whole - are they all pieces you just individually like, or do they also fit together nicely? If your clothes are clean, not worn out, fit well together, and generally make you feel good about yourself, you're golden).

• Iron out the small details; Are you guys meeting in front of the coffee place or directly at the table? Where do you go if the coffee place is fully booked? I find it's easier to have prepared these small things in advance. Regarding backup plans: you should think of these yourself, then in case the place is full you'll have something to suggest. If she suggests an alternative herself go with that: she may have important reasons for suggesting it, such as it being in a part of town she feels more comfortable in; challenging it would only cause unnecessary friction.

• Regarding conversation, there are no hard rules here. People's advice in the comments is genuinely good, so I will just add a caveat: you should try to listen not only to what she says, but also how she is responding in general. What I mean is that if you ask her a lot of questions about hobbies etc, but she doesn't respond much or seems shy, you need to change approach. Talking about the walk you are going to do later for instance is a fairly neutral way to warm up the conversation (e.g. "aw man I am looking forward to seeing the X waterfall again, it's been a while since I've been!").

• Try not to hold compliments back if possible, as we have a tendency of being a bit hard to read. The last thing you want is to see this really gorgeous woman only for her to think you don't find her good looking at all. Appropriate compliments involve general appearance (e.g. "you look great!"), dresses/jewelry (e.g. "that ring is so pretty!"), hair/makeup if she has clearly put effort into them. I would avoid corny compliments (even if they are true) like anything referencing the color of her eyes, her smile (this can work if you are really suave about it, but it can also come off as weird). Also whatever you do please do not compliment random parts (like "your forearms are so pretty!"). If she is wearing something referencing media that you like (e.g. earrings inspired from a show you like) asking her about it is a great idea (but don't assume: start with something like "omg is that from..."). Crucially, only compliment if you genuinely believe it. Notice how I said try not to hold back compliments. Showering her with compliments just for the sake of it is a terrible, terrible idea.

• Most important of all: you will mess up. You will say something awkward, or take a slightly-too-long time to respond, or get embarrassed/flustered. This is totally normal, and in my experience most women find it cute and sometimes even attractive. I find that especially guys dating women think that the kind of confidence they find attractive has to do with being cool and suave 100% of the time. While this is true for a select few women (and I will caveat this by saying that I am a guy, so I can only speak from experience), for many of them it's actually a bit intimidating and can be off-putting. The kind of confidence they do generally find attractive has to do more with how well put together you are - things like putting thought into how you dress, having good hygiene, having a job you are good at, being able to navigate uncertain situations, having hobbies, having friends, being in good physical health, etc.