The reason why I am asking this question is because I think that the ssh port I am opening only has access to my repos (which means that even if I somehow get hacked the damage is minimal) and it doesn't accept any keys aside from mine and my friend's, which we set up through the web interface :).
I have wireguard setup and I'd also thought about sharing a tunnel with my friend, but it seemed much more hasslesome than simply opening the port, not to mention the fact that if anyone wanted to join too I'd have to do that again.
It is exactly because I am afraid of getting fucked that I am asking this and being careful. For now, my idea is to only open the port when someone is about to use it, since I am not absolutely sure that it won't somehow accept a request from a person with less than noble intentions. (either that, either simply use tokens)
Reverse proxying was also my intention at first, but I just couldn't get it to work with cloudflare for some reason!