Your thread OP, was the right thing for me to read today with the title of 'limited options' etc.
I actually find it quite inspiring and I admire your bravery in identifying how you feel about this. It is tough being a parent and you have successfully distanced yourself from an unhealthy relationship.
It is also tough, but rewarding being a single parent. But in some ways you are in an excellent position to move forward. Great that your business was going well, you must have the skills. Whether or not you keep it as a 'side' hustle or the main event it will be useful.
Colleges now have structured pathways which is kind of like doing quals step by step. You do the first step and they then point you towards the next.
Also some colleges and unis have work agencies where the help you to put your c.v. together and offer work opportunities like helping out at conferences etc.
I finished a degree in 2018 but lost confidence somewhere along the line, and then the pandemic came along and had to home school for ten months, which meant that my mental health suffered and somehow got stuck on benefits. But if I ever get to a job interview again, and they ask me what I had achieved during that time, I will say I home schooled DD and got her through her G.C.S.Es hopefully with flying colours though results aren't out yet.
Hopefully like you, although I'm much older I am recognising that some of my ways of thinking have limited me in the past, that I haven't seen or taken advantage of opportunities because I've not seen how they might be possible.
We all learn throughout life, and I've had major fuck ups, but come out the other side.
I'm in a different phase now, dealing with the last bit of my divorce settlement which is very stressful but hopefully when it is done I can do something new.
Thank you for posting, many things are possible
Advice in a nutshell from me would be 'just start' and enjoy the journey.
College/uni will bring new friends and possibilities, work, social etc. it is always worth it.