How can I start building a fixie bike from scratch?

To start building a fixie bike from scratch, you will need to gather all the necessary parts such as a frame, wheels, pedals, chain, and brakes. You can either purchase these parts individually or buy a bike kit. Assemble the bike by following a step-by-step guide or seeking help from a professional. Make sure to properly adjust and tighten all components to ensure the bike is safe to ride.