Re: New guy, need a bit of help!
I know you would have to get rid of the coaster brake, but I highly reccomend getting a single speed bike. This gives yoj a much more massive amount of leeway with chain alignment. You can spread the frame and put washers on the axle, an exteemely easy fix that was impossible with my 7 speed walmart cruiser.
Avoid having problems and taking it to a machine shop for $275 like me. If I knew how much it woulda cost, I wouldn't have taken it to the shop, I would have bought a new bike.