Ok, thanks

Do you have any suggestions for hubs/ wheels (with simple box shaped rim, I donīt want any crazy deep section wheels or aero spokes

) Or maybe which brand or online shop to avoid, or which is good

I am new to all this, so all i can find on the internet right now is aliexpress or ebay, where are mostly novatec hubs which I donīt know much about. Also should I consider changing the crank set, because the bike has pinned cranks, which i worry about if it can handle fixed riding.