Making friends as a mum

Does anyone else feel hopeless in trying to make friends? I left high school early and moved interstate so I never had a ‘group’ to grow with and stay in touch.. school was a struggle for me socially. I still to this day feel as if there is something wrong with me as I have no friends. I’ve tried different mum groups but nothing has ever clicked, 90% of conversations on this app fizzle out.. I don’t know what else to do and am starting to feel hopeless. I’m only 22 and feel like I’m missing out on a big part of ‘girlhood’. Any advice?