Sailing Bremerhaven

I plan to visit Bremerhaven for a couple of days this coming May and would like to spend some time sailing one day for a few hours; however, I don't want to go on one of those uber large tourist sailboats. I would prefer to sail on a small boat that is for hire, run by a local. Can anyone recommend someone? If so, do they have an email I can reach them at? Thanks in advance!