How do I make friends now?

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I'm 16, male, and am in the 10th grade. I am currently home schooled and I will be for the rest of high school. I love home schooling and it is much better for my busy schedule. I went to public school up until high school. Most of my friends were "school friends" so I immediately lost contact with all of them. By the end of 9th grade, the rest of my friends faded away. With being home schooled, its not impossible but it is harder making friends.
I loved hanging out with friends and talking to them. I know I can make friends but I don't know how to do about it. I don't have a Facebook anymore but I could easily make another one. But if I do, how to I talk to people again? Do I just randomly friend them and message them or what? Also, I will be playing football and track and field next year for my local high school so I am sure I can make friends then but what should I do until then?

Any helpful ideas would be great!

Thank you all and please no rude comments!