I deal with being alone as I deal with being with others; you have to have something you enjoy doing and do that; that will both make being alone okay and, will involve you with others as you research and study to learn more. If you love knitting, for example, you are going to go to knitting stores where others are taking/giving classes, buying patterns, etc. and conversations will be easier and the possibility of striking up a friendship easier. You need to know what you want of yourself, what gets you excited and pursue that and other possibilities will open up. I was into reading, books and the library -- hardly exciting group activities but ended up becoming a founding officer of my Friends of the Library organization and making several life-long friends (this was 30-35+ years ago now) and moving on to other library volunteer jobs with other groups, etc.

One has to practice interacting with others to become good at it, just like any other activity/skill. Get out and actually do things with others, activities of all sorts -- talk to store clerks when you check out at the grocery store; visit restaurants and other local businesses on your own and get to know the business owners/your waiter/waitress well enough so they know you and what you like to order; go to town hall meetings and voice an opinion, be "seen" by others.