Doubts

There's no law that says that you have to ride fixed. If you don't want 28 gears and are nervous of riding fixed, buy a single speed with a flip flop hub. That way you get used to the bike and can then try fixed. If it's not for you, flip the hub back. I did it that way but never went back.

+1 I agree. Maybe ride ss until you get used to no gears. You can then flip the wheel and try out riding the bike fixed when you feel like it.

I currently am riding ss. I am doing so because I moved here 2 years ago (this month) from the US, and just recently purchased my first bike in the UK. I moved from a town that had far less traffic, and wanted to get used to riding in London traffic before switching to fixed.