Well, welcome to Name Pros! You can post in any of the forums with your ideas. IF you want to register your names, there are many registrars. I would personally recommend registerfly (registerfly.com) and Namecheap (namecheap.com) but there are many more out there like idotz and godaddy. You can also reg names here on NamePros! Reading posts in this community will get you off to a good start to domaining and should you have any questions about domains, you can always start a new topic in this forum as there is always someone on NP at all hours of the day that can offer you assistance!
Have a good day!
-Ambrose