(you need an account to see links) is an excellent guide to securing your new items/account! You should wait longer than just a few hours, especially as things like the email and PW will need to be changed once you do log in, and doing everything at once might very well trigger TNT's alarms. People move, things happen and people do change their IPs all the time for various reasons, so just an IP change for the account that you're currently using is probably a-okay.