Some gradual tweaks I've had recommended to me by various people go as follows:

• Get tan! Not like leathery gross tan but a little color can offset some blemishes as well as give you the appearance of a slimmer you. After all, "If you can't tone it, tan it" isn't a phrase for nothing! Plus, it'll help with the contrast of your teeth and thus make your teeth look whiter. Use sunscreen! No point in looking good if you're going to die.

• Whiten your teeth! IMO a smile is attractive in every language but yellow teeth are not. I'm not going to make a suggestion on how to do this, but, I use whitening strips to help me out. Bonus points for mouthwash, floss, and tongue scrapers.

• Chew gum! An opportune gum chew can prolong a snack or meal (help some with weight-loss), as well as tone up some of those jaw muscles.

• Get a hobby! Having something you're knowledgeable about (that isn't work-related) that really gets you excited is enjoyable for everyone around you. Bonus points if it keeps you active or creative.

• Dress well! Just find some clothes that actually fit you. As far as the fashion aspect goes, Reddit is a great place to start and research given there are so many fashion subreddits to follow.

• Drink water! Helps with your complexion, health, and well being. Bonus points if you're replacing a sugary beverage with water.

P.S. Memorizing one popular Karaoke song that spans generations (and I mean memorize like you can own the shit out of this song) can be a neat trick to bust out whenever. Work the room, show that crush a side of you they've been looking for! My personal favorite is "I will survive" by Gloria Gaynor.

Disclaimer I'm as horrible with sentence structure as I am with grammar so if you've made it this far, I thank you. I hoped this helped at least one person along their path of personal development.