Introducing is definitely not necessary, dear; if you wish to do so, that's fine. If not, then that's okay, too. There's a lot of users on here that haven't done it, including myself. Though, I probably should've, because that way I would have been able to make a couple of extra friends!
Anyway, welcome to PokéCommunity. Hope you like it here, and have an enjoyable stay. Should you ever need anything--anything at all, really--I'd be glad to help. Send me some message any time you want, and I'll respond as soon as I possibly can. If you just want somebody to talk with, I'd be happy with that, too--just drop a message on my profile.
See you around!