The Recruiter was extremely helpful, but people have widely varying experiences. Take the time to verify what you're told online or with friends; a very few recruiters will lie, but, as in my case, many of them just aren't that familiar with the ins and outs of the position you're looking at. I ended up doing something very different than what I signed up for. The Recruiters will get you through everything as far as admin goes, but you'll have to score well on the asvab, then pass the dlab. If there's a way to prepare for the dlab I don't know what it is. The test mostly has you learning mini languages to apply to 4 or 5 questions and seeing how well you can pick up on the new grammatical rules, words, etc and from that how much meaning you can glean from a passage.

Be careful to make sure you get what you think you are siging up for. Most recruiters are straightforward, however make sure to get in writing the title of your job as a Marine. Take your time to study for the ASVAB test as this will primarily determine your occupation and be diligent in self excercise as this is a bare minimum to be entitled as a Marine.