How to improve social life ?

im 16 i used to have allot of friends my freshmen and sophomore year in high school. I got arrested during my sophomore year and my dad did not let me go outside because he found out i was hanging out with a gang. The O.G's gave me the boot because i was not hanging out with them or putting in work.Then my junior year i was all quiet and rarely talked, i got into some fights because some people thought i was still from that gang. I am in summer vacation and bored no friends and sometimes thinking if life is even worth living.Im going to become a senior and im don't have any friends and my social life is basically dead. what do i do to have new friends or to start conversations with people