Why do you want to be famous? How widely known do you want to be?
Do something great in your community and then become the spokesperson for your chosen cause. If you’re genuine, dedicated, and motivational to others some level of notoriety will follow. Just don’t be afraid to ask for it. Contact existing media or create your own to get the word out after you’ve accomplished something but before your “next big thing” so that can be covered. If you continue to be successful you will do great things and also make a name for yourself.
Again, depending on why you want to famous this may or may not accomplish your goal. If that’s too much work, I’d recommend writing catchy pop tunes using sexual innuendo you later claim was unintended.
Good luck.