Decide to become a bicycle mechanic.
Try to fix your own bike. Make a hilarious mess of your gears and brakes. Apply for a job at a local bike shop, with your resume full of things like “good with my hands” and “cash handling experience. Never hear back.
Begin hanging out at the local hippie bike co-op. Patch a lot of inner tubes. Learn to strip wrecked bikes, adjust cranksets, install chainrings, build wheels. Put in a lot of free labor while fending off the advances of various creepy, older men who hang out there also.
Get tired of your job; quit. Plan to ride your bike to Mexico. Chicken out and downgrade your plan to riding from San Francisco to LA; do it; have a blast.
Come back to your same old job, with a newfound confidence, and further determination to become a bike mechanic. Patch more inner tubes.
Step 2 still in progress.
Step 3: ???
Step 4: Profit!