Hey there, welcome to the forum. The place has a lot of stuff going on normally so you won't be hard pressed to find an RP eventually. Just don't let your new guy nerves hold you back. The people here are pretty chill. I suggest also you talk about a bit, hit people up. Try to network, it makes it so much easier to just know a couple of people even if just jamming in PMs because they tend to go "oh, shit. Fuzzy might like this thing that now looking for players"
I hit people up randomly all the time. People appreciate interest, you know. Tends to work out most of the time. Feel free to hit me up to chill, I more or less just lurk here and RP in PMs mostly but I've been around RP forums a lot myself.