Easy to fix, go to the lbs and ask them for a BB cup spacer, or a BB spacer, many mtb shimano crankset kits have them just in case and lbs usually do not use them so thye should have a few moving around. If they charge you 20 bucks for a couple send them to hell and never come back to that shop, new ones only u can find them pretty cheap, so the guys should be able to give you a few for free. The spacers are like 2 mm thick

Take the freewheel off and put the spacer between the hub and the freewheel. That will bring the freewheel off and the chain line will be better. In that way u dont need to do a single thing like redish the wheel and stuff.

Good luck.