First Pride, need masc outfit tips! (can’t bind, heat-sensitive)

Info: It's all in the title, but if you want the longer version — I’m non-binary and feel most comfortable in masc-leaning clothes. I’ve never been to Pride before because I’m socially anxious and often struggle with sensory issues, especially in crowds. :(

This year, my best friend invited me to Pride in her town, and I’m excited to go! However, planning something like this is a huge deal to me because I need to know exactly how the day is going to be, clothes including...

I’m scared I won’t look the way I feel inside, which will make me self-conscious and miserable. I really don’t want to spend the day like this. :(

I own a binder, but the tight, compressing sensation makes me overly aware of my body and really uncomfortable. (though I do like the way it looks), I also can’t wear anything sweater-like because it’ll be too hot (and I don’t handle heat well).

Do you have any clothing tips? For the top half I’m open to specific suggestions since I might still have time to shop ! (I'm open to more general tips too, I'm quite desperate)