20 year old [Bi-curious male] with several questions

Hey all, so I'm not really sure where to start but I've been sexually interested in guys since I was about 16. Started watching lesbian porn, which switched to straight porn which switched to sissy/trans and even gay porn occasionally. I've sucked a few dicks and even gotten fucked twice but it wasn't as enjoyable as my times with girls and sometimes I even felt regret.I have no romantic attraction to males whatsoever, have no desire to go on dates with guys etc. However I do find the entire body of a fit guy attractive and imagining me being submissive to them gets me extremely turned on.The problem is going forward, I consider myself bi but I also don't think anyone needs to know, i.e. since it's just my sexual preferences I don't want to come out because that's personal stuff anyway and I'm never going to have a romantic relationship with a guy.That being said I would like to experiment around with other guys and even transexuals but I have no idea where to start. I want to avoid STDs obviously and creepy people in general so craigslist is out, don't wanna download grindr because I'm still on my dad's data plan and I fear he'd find out.What are some good tips/places for a relatively discreet bi male to use if I wanted to mess around with guys and tgirls (without paying obviously)?How can I lower the regret of some of this stuff - I'm obviously turned on by it and have some of my best orgasms while fingering myself or watching porn centered around it but almost every time as soon as I cum I'll feel slightly ashamed.How can I ever get a dildo or any toy for myself while still being discreet about it and hiding it in a good place?