I have a 2 year old misdemeanor larceny conviction, can i still join the coast guard?

You will probably have a hard time. I suggest speaking to a recruiter. Waivers of just about any sort are not being accepted at this time by the CG. So you will probably be out of gas. Sorry to say it but there are people lined up to get into the CG with Bachelor's & Master's degress with squeaky clean records... and they are having a hard time getting in.