Wow.. Firstly, download permissions read permissions help to make yourself admin And you might want to get AdminCMD aswell. If you can't do any of those you shouldn't be hosting a server.
Well, you could use permissions to make yourself an admin. But you could also just OP youself by using the command /op [username]. For most stuff there are plenty of plugins you can install. As long as you know how to install plugins, you'll be just fine. Maybe this vid wil help (not mine by the way) http://www.youtube.com/watch?v=S3iczNTSNfQ