My biggest concern is that I don't want you to do what everyone else does and that is start your research for artwork by using Google images. Google images isn't a bad place for ideas, but because everyone uses this method you run the risk of duplicating someone else's tattoo. And I am sure that isn't what you want.
The best piece of advice I can give you is to invest in a paid tattoo site. A paid tattoo site gives use so many resources before you get your tattoo. You will gain access to artists that specialize in tribal tattoo artwork. You can work with one of these artists to come up with something unique for your new ink. You also gain access to a huge community of tattoo enthusiasts that will be able to answer any questions or concerns you may have. These paid tattoo sites also have reviews of local tattoo parlors so you can find the right parlor for your new tribal tattoo.