Should I ride my first fixie back from the shop (in London)?

We all know your serious and the worry you have is sincere, but it's a funny question. If you have a brake just ride the bike. If you have been mountain biking for years, it's pretty surprising that you would ask a bunch of cycling people if you should ride your bike or not. Seems like you should HTFU and just make a decision yourself. If you ask a silly question you get a silly answer.

Thank fuck! Someone with a bit of common sense!