self employed autistic and looking for nice girlfriend

I am self-employed so have no colleagues to court, and I find it difficult to communicate with people I am 21, I really want a nice girlfriend but it seems an impossible feat I am alright looking,

I have been watching a lot of cold approach videos they get their number, I am thinking of trying to do that, I tried online dating that was a huge waste of time got into a few conversations but they never wanted to actually meet, I also have no idea how to tell if  a girl is into me or just wants to be friends, the other thing when are you meant to kiss her ?

if anyone has some tips they would be greatly appreciated,