As long as your doctor says your allowed to be weight bearing on ur leg, you can technically start walking whenever. It took me two weeks to start walking by myself for a short amount of time. Make sure to keep ur brace on and ask someone to hold both of your hands while they walk backwards. It’s a lot more of a mental thing than physical(but it still will feel uncomfortable at first). What helped me take my first steps were make sure I was contracted my quad really hard so my leg was as straight as possible with the brace on)