How to pull life by the horns and change my life to what I want?

In my 30s, it's about to be a new year, about to 1 age older. I want to completely change my life to the way I want.

I know I should take action, I know I should start small but reality is it is never that simple. Just these suggestion is hard as is and been struggling with that for years

Action- I want to go and meet people and make new friends and expand a new social circle.

volunteer- I'll run into older folks who I can't relate to. running/sports (i will need to have a vested interest in it), I'm also 30s and a lot of the people already have their own family and friends that they aren't open to meeting more. The younger crowd will age discriminate.

Career- I don't have a career. Idk if I even want a career. Going back to school will only accumulate more debt and I already don't have any work experience, so another 4 years I will be graduated with no experience almost 40! I do have a bit of project I want to work on like business ideas. But I don't know where to start and I don't want to completely isolate myself and become a workaholic but it might be required. Every time I start something I never finish. Starting small doesn't seem to work because it quickly lose steam.

Finding a girlfriend- I am active on dating apps. The women who likes me I am not interested. the women I like are not interested. Right now it is winter but I do plan on putting myself out there same way I would meeting friends and can only hope. I am not desperate but being in my 30s with friends who are in relationship/getting married is rough... I might have to do some side jobs like bartend just skew towards age appropriate women to date or even book clubs..

Only positive is I do cook consistently at home, I work out every single day at the gym, I get my 8 hour of sleep, I take care of myself (skin, dressing sense, etc.