Honestly, dating apps can be really good for this. Although polyamorous, I state in my profile that I am also open to just friends and my interests. Two of my best friends I met 4 years ago via Tinder. There are plenty of folks looking for friends on them. It especially seems like that for OKC.
Edit: most of my trans friends have been on a local discord community or through people I met on it.
I haven’t made new pieces yet, but I’ve had similar thoughts. I started with mending and altering current pieces, both masc and femme clothes, to fit my body better. That’s helped with learning differences between their construction.
I’d been out of doing that for a while but meaning to get back into it, now that I’m done with moving stress and seem to be at my new baseline fat distribution post being on progesterone.
If I find any resources in returning to that, I’ll try to post. Would love to see what others have come across.
Specifically, I would love to make/find boy shorts style underwear with just enough room to fit myself comfortably without being too bulgy. (I prefer to not tuck)