@lola7 Left home when I was 23 as well. Up until that point I was paying cheap rent to my rents and footing my bills. People are saying you should stay at home until you become financially responsible but people work in different ways. If you moved out, life comes at you pretty quick and you tend to learn pretty quick. It seems there's temptation there to dip into savings because you have the security net in your current situation.
I'd say you need to truly add up the costs for moving out and set yourself up with a clear (reasonable) budget. Do it for 6 months - and stick to it!!! - proving to yourself you can do it.
If you're feeling that you can't save at all and have destructive spending tendencies I'd say look at some therapy as there could be something else going on. Not suggesting there is but just saying if you feel you have to spend all your money and can't control yourself it's good to seek professional help.
Lastly, I might suggest you undertake the envelope method. Everytime you get paid, withdraw your money in cash and sort it according to your budget into your envelopes marked rent, bills, groceries, fun, savings. Not completely doable with everything (phone bill direct debit etc.) but it should help you start to segment your money and allocate accordingly. Having to physically open your savings envelope and take out physical cash and spend physical cash might help you cut down or tell yourself 'no' vs an easy Google Pay tap on the phone.
Good luck