Help with dating apps & hooking up

Hey everybody! Im 24yo, bi, still secret about it. Ive been using the app Manhunt for many years, met one guy (20yo) 1.5 years back and got the courage to give him oral. (It was amazingly fantastic for me:) ) but nothing else since. Are there any better sites? Where do you folks meet guys? Im not looking for a serious relationship but a fwb to explore and experiment with.Also, how are guys brave enough to just meet up and fuck men they met online?? I got lucky with my first hookup but whenever Im messaging someone and we start talking about meeting up I get cold feet and shut down. I dont want to catch a disease. Is it wrong if I ask someone to hangout somewhere first instead of just going straight to their house? Should I ask about recent std test results and if they're clean?Sorry if this post is confusing or sounds stupid. I just really want to explore this other side to me but dont know how to in a correct and safe manner. Any help would be greatly appreciated (: