I've been doing it 8 years to one DD. Since birth pretty much. no family nearby, a useless ex who can't contribute and is unable to look after DD (pops in occasionally but is a headache!). I still have a lot of anxiety, but have realised it's part and parcel of being a single parent. Recognising that makes me feel a bit better about it, in a weird way.
You have to focus on controlling the things you do have control over - your home, your money, your time, your stuff. And work on getting them as good as you can. Small changes, small steps one at a time towards larger goals without getting too weighed down by the bigger stuff. Decluttering, organising, taking the tiny things that help you feel better. Also put some things to look forwards to in your diary! (Harder at the moment). These help to lift my spirits. Focussing on what you do want to do / make happen, rather than get bogged down in what's wrong.
All this said my anxiety is a LOT better than it was a few years ago, I think I've learned to cope with it better. Recognising it for what it is is really helpful. I think most LPs go through it.
In time you will love the freedom, but it will still have ups and downs. (Doesn't life always). Stay focussed on the process and your successes though. And maybe if you want to train or work towards a career think about what you might really enjoy doing and take the smallest step towards that. For example, if you wanted to be a florist, you might look at online courses, or start to learn about flowers or something. Then the next step becomes clear. I find I need small and big goals to keep me going and keep the hope up!
And staying organised is SOO helpful for anxiety. Paying bills as soon as they come, or replying to emails immediately - action straight away. it helps with the nagging doubt. Finally thinking ahead to Xmas etc - finding ways of saving cash all the time. This really helps me feel better. E.g. wearing extra jumpers to save on heating, or buying from charity shops, or switching mobile phone contracts. Anything you can do to spend less (without completely depriving yourself - we all need a treat) can help you feel more in control.
Best of luck :)