How do you socialize?

Good day everyone. I rapidly became a stay-at-home mom to two teenagers shortly followed by a little one. I have been feeling so isolated that I'm getting to the point where I just feel miserable all the time. I have a very supporting husband and overall my kids are great, but I'm still not happy. I'm doing everything I'm supposed to to take care of my mental health and yet still seems to circle back to the fact that I feel very alone and I don't know how to fix it. What have you found that you've been able to do to be social and still feel engaged with her people? I'm a military wife, so I don't have family or friends around. Anyone have any suggestions?