>>395704
Seriously the biggest key to approaching is just doing it. The first tries will be awful autistic shit, but thats no shame - mine were aswell. But the best part about it is, that you wont worry about what-ifs with someone afterwards as the score is settled.
Obviously your gaydar will let you down more often then not. However I found that most hetero guys I approached felt flattered by my approach. If they react badly they are cunts anyways and not to be bothered with.
Escalating things is the least problem to think about at your point right now. Most often then not these things will happen naturally along the way.
Just get yourself out there when you see someone interesting - good luck!