Would I b able 2 get in the Marines if I have a felony or misdemeanor

Talk to a recruiter. They can advise you of any and all options.

If you are in the US the answer is most likely no.

Waivers required for
Five to Nine minor traffic offenses

Two or more Class 1 minor non-traffic offenses

Two to Nine Class 2 minor non-traffic offenses

Two to five serious offenses

One felony
Civil offenses
Misdemeanors
A combination of minor and misdemeanor charges

Criminal History Waivers for Joining the U.S. Marine Corps and U.S. Navy

Can I Join the Military if I have a Felony? - Enlist - MilitarySpot.com

With the military cuts the way they currently are, they are trying to take no one without a squeaky clean record.