That depends if somebody finds out! Most likely your recruiter will pay more than you would.
There are so many life lessons that can be learned in the Marines there isn't enough room or time in this forum. Suffice to say that you will learn discipline, self-control, but mostly how to deal with situations and people that are so outrageously full of bull#$%^, lessons that are better learned sooner rather than later in life. Life is NOT fair...but the Marine Corps will teach you this the hard way, in spades. It is the best prep for the real world and how to put up with it. You will meet complete buffoons that have no business leading ANY human being, much less a platoon of devil-dogs...but you will also meet some of the most awe-inspiring, idealistic and motivating individuals that will have a life-lasting impact on your character. Men that are larger than life, seemingly unbreakable, that you would follow into hell on any given day. Men that might end up being your best friend. They don't make up sappy slogans for nothing. You will have brothers for life, guaranteed. You will have stories for life, times you will NEVER forget.
You will find yourself standing next to a former gang banger on one side and a CPA on the other, being treated like you are kindergartners with no common sense and you will get so pissed that you only see red. You will play silly games with these brothers of yours, wondering how rational human beings can tolerate such treatment for next to no pay, little sleep, bad food in some of the worst climates and locales the world has to offer...and the funny thing is you will come to love it all. You will get to blow s*#@ up, shoot things, destroy everything in sight. Or, you will stay in the rear with the gear and support those who do, fixing their radios, trucks, or food. Sometimes both.
Like what many others here have said-- it is what you make of it. Sometimes I wish I could go back and endure some of the many experiences with a different attitude, for I miss it so! It can be the worst experience of your life, or the best. Maybe even both. Up front, get everything in writing. Your recruiter WILL LIE to you. Their job is to get you to sign on the dotted line. It isn't personal. Do NOT go "open contract". Keep in mind that although they do have some standards, we are still at war and they need numbers to fulfill their recruiting quotas for the year. The higher you score, usually the more they will offer you. If you have second thoughts, don't join.
Join the Marines for ONLY the intangibles: duty, honor, integrity. All the corny stuff you hear on the commercials and see on recruiting posters. Join to earn that title. Join for the right to get goose bumps whenever you see the Silent Drill Team perform or when you hear the Marine Corps Hymn. But, take the good with the bad. You will either love it or hate it. I will NEVER regret my decision to join, and wouldn't trade my time in the corps for anything. If you are looking for better schooling opportunities or to learn a trade, join the Air Force, Army or Navy.
If nothing else, just think of all the military vehicles you will get to play with!
Feel free to PM me if you have any other specific questions and I will attempt to answer, as it should be obvious I have an opinion on this subject....
Semper Fi!