Some pretty sound advice in this thread
Like Sugar said, try to get to know people and most importantly don't thirst in PM's. If you're gonna PM someone ask how they are and make sure they want the same things. You're looking for females yeah? Make sure they're not F/F only (Reading bios is a good start, it seems a lot of people don't do that) if you want to get to know people in the community. Ask them what they like, rather than assume they like what you like or assume they even want to talk to you in the first place, some people simply don't like to be PMed and prefer talking in main chatroom or the main forums. Thirsting in PMs or in any way though is always a red flag for people and that's a fast way to get a bad rep, it's bad form and simply just disrespectful. Most of this is probably relitive to the chatroom if you do go in there and I recommend you do, there are some decent and fun people in there, just don't expect the main room to be tickling related 24/7, because a lot of people like to just chat and chill, however that's a great way to meet people and break the ice. You'll get to know people pretty quickly in there, but don't expect to make friends immediately, it takes time, took me years but I met one of my best friends in life through TickleTheatre chat room (which has now long gone) so it does happen.
Like David said don't be attention-seeking, that's another red flag because as David said, it comes off as desperate. Respect is key, care about other people's needs and not your own. Plenty of times people have had a tantrum just because they didn't get what they want, again, that's bad form. Respect what others want and are in to and like I said above never assume that everyone wants what you do.
Like Elyos said, patience, it was a looooooong time ago but when I was a newbie I barely talked and it took me some time to actually meet people and get involved but once you do, and people see that you want to interact, are respectful and are just like them they'll welcome you with open arms but patience will be required, as will respect, two key points of what Elyos and David said. Also like Elyos said, new comers going "all in" is not the way to go.
It can be hard to find friends on here, or even people to chat to, but it doesn't necessarily need to be hard. Take the key points points of Sugar, Elyos and David, don't thirst, be patient, be respectful etc and it will happen.
Hope this helps