Find some small site or tool you usually use, identify the shitty parts you wanna get fixed, check if you qualify for the task (can you do it, can you afford it

Find some small site or tool you usually use, identify the shitty parts you wanna get fixed, check if you qualify for the task (can you do it, can you afford it in terms of time and $), identify ways you can host it for free or ways you can monetize it, set a deadline, work on it.