Registering a trademark

The USPTO's TEAS system, while antiquated and with LOTS of text on almost every screen, is not terribly complicated and a non-lawyer can definitely "figure it out" inasmuch as the non-lawyer may successfully file and pay for something. That is merely procedure, however, and the true benefit of an attorney (who might breeze through the electronic filing in just a few minutes whereas it may take the uninitiated much longer) will be realized before then: evaluating mark selection, performing trademark clearance searches, and ultimately advising on exactly what to file. Moreover, as the other attorneys have mentioned, applying for a trademark registration is a legal process with the U.S. Government complete with attestations, oaths, and declarations. Engaging an attorney to review your proposed marks, qualify their registerability, selecting appropriate classes of goods / services, and filing the application does not have to be terribly expensive: absent some exotic situation, you should be able to find an attorney who can do the foregoing for well under $1,000 / mark.