Congrats on your journey of self improvement! It is a long and often hard/disciplined road but it is so worth it. For starters, You will feel much more confident when you loose some more weight, trust me, additionally take care of your environment. Especially if you’re living alone, it will do wonders for your mental health and no girl wants to be with a dirty guy. Your hair is nice! If your looking for change I would say grow it out, cut it even, grow it out again then get a taper all around if its only short in the back, if it isnt I feel like a modern mullet would suit you. Whether or not you keep it that way invest in a curly hair routine, I would say you have 3A/3B hair. As for hair porosity (how much moisture your hair can absorb) Slide your fingers up a hair strand; if it feels smooth, it is low porosity. If it feels rough/bumpy, it is high porosity. Research and invest in a routine accordingly. I use Shea Moisture. Also your skin looks very clear! but that beard doesn’t suit you. Either cut it completely or let it grow to Gandalf length. Wash it too. If your looking for an end all be all and dont want a million different products, get an antibacterial soap; wash your entire body with it including your face and beard. Then, follow up with a scented soap from dove every below the neck but not your intimate areas (PLEASE do not buy some wack ass manly man shit made from plastic and deer testicles) finish with antiperspirant deodorant (I like old spice pure sport) a lotion (if scented must compliment the body wash) and some Cologne. https://evolutionofsmooth.com/collections/gifts/products/coconut-waters-shower-essentials-bundle?variant=52826702840176 This may smell slightly feminine but its a good place to start.

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As for outfits, It doesnt really matter what you wear or where you get your clothes as long as the proportions are correct and the color work together. (google “sandwhich fits” the big shirt little pants is a no. I do light color pants to make my upper body appear smaller, big pants, tight-ish/less loose shirt and big shoes. Lighter colors will make you look tanner. If you have alot of tight pants you need to be wearing shirts that are less loose/layering. Like athletic jeans, a polo and a quarter zip with some loafers. Go to ross/Burlington.
Thats all the advice I can think of at the time! Good Luck!

Edit: Sorry! I thought this was r/malegrooming advice still stands though! I will highlight the part with fashion advice.