I think I was nervous, a little, at least. Although that feeling quickly vanished and hasn't come back since.
My very first time was when an internet friend suggested it as she knew I like to write. So while we were chatting on MSN messenger she sent me a link to this weird room set up. It called itself a hotel. I had no idea what I was doing and pissed everyone off by writing in first person and just getting it all wrong apparently. Was I nervous? No, because I didn't like the set up and couldn't see the appeal, even if I was to have got it right.
The second time was 1-1 with someone I met on a forum not related to RP we just did one session RP's "hooking up" when we could and starting a new RP each session.
Third time was on a forum like this one. Can't say I was ever nervous as I knew if ever really ballsed it up I could just start again with a new account.
Man, I remember the first time I tried to rp. It was on IRC and I was... maybe ten? It was a Mega Man X RP channel. I was nervous as hell, and I couldn't type for shit. I quit for a while after that because it actually went really poorly. Once I learned to type (homerow and all that shit) I came back, but that channel had since closed. I joined a Final Fantasy RP channel on DALnet instead. Good ol' Blackpearl was my first character that I ever played that lasted.
I remember doing some rp stuff on AIM with a few friends, and Gaia was the first forum style rp I ever joined back when I was in high school which I think was my first instance of ERP (even though it was against site policy, shhhhh don't tell nobody). That had me nervous all over again cause what the hell did I know about sex back then? Despite that, It worked out, apparently.
I can't remember that far back, but I've always been fairly pushy. If anything, I was the one making them nervous ^.^
Well aren't you the sweetest! ^.^From your kindness I couldn't see pushy, but I am not surprised.