I've been avoiding retail and customer service jobs like the plague!

I've been avoiding retail and customer service jobs like the plague! I work full time in a non-speaking position (dream job for a stutterer, right?), but I want to earn a little extra cash to knock my debt out faster. Gazelle-intensity, scorched earth on this bitch (see Dave Ramsey if you don't get the reference) I've been looking for like 2 weeks now and the only type of jobs available that will fit my schedule seem to be retail and customer service jobs. I've been avoiding those like the plague but I might need to bear the storm and pull myself up by my bootstraps. Any tips and advice on how to tackle this? I'm very friendly, smile a lot and joke around type of person. But my stutter severely limits my ability to fully express my personality. Kind of like an extrovert trapped in an introvert body.