The important thing about a trademark is that you start using it. If you run into a problem with somebody else using your name, the most important thing will be

The important thing about a trademark is that you start using it. If you run into a problem with somebody else using your name, the most important thing will be who used it first, not who TM'ed it first. In fact, if they TM a name that you had first, you can claw the name and the TM away from them. Unless you are expecting somebody to steal/abuse your name, there's no rush to TM.