What is a good 68 series to reclass to ?

What are you interested in? Because you have to think about career progression vs skills vs job satisfaction. There are some great jobs in the 68 series but most are low density which means tougher competition for schools and promotions.

68W. Once you get that AIT over and get some experience under your belt, apply to Flight Medic school.

68C if you can handle a year long schooling.