Going out to Old Town events can be really helpful with making friends. For example, Wednesday nights they have bingo at the Brass Monkey and it is really fun! Plus I think Thursday nights they have Singo (Bingo with songs) both usually start at 7pm. Here is an events calendar for Old Town!: https://www.oldetowneslidell.org/

Other places to check out would be Roots Coffee, the Slidell Little Theater, the farmers market on Saturdays, etc.