I'm thinking the OP is doing pretty good given their location; English is probably not a first language.

OP, the crank will probably work (it's free so it can't hurt to try). I would compare the size of the chainrings, the large one especially, so you don't wind up with too much or too little chain. There are plenty of helpful people here if you decide to tackle the job yourself. Having enough posts to post photos is a big help (I think you need 10).