I am home schooled and I dont really have any extracurricular activities that I have done. Should I start doing some?
What grade are you in? What are your interests?
Generally, yes, you would want some ECs. But hopefully you’re not in the spring of your senior year. 
I am 18 in 12 grade
Recording Arts
Surely there are other things you do, just not affiliated with a school? Do you work? Babysit? Church? Tutor? Volunteer? Play an instrument?
oh ok i didn’t know that could count as a EC. Thanks
Those do. Think along those lines and you’ll have your ECs!