I finished my A-levels about 7 years ago in 2010.
I was in a situation similar to you.
Whatever you do, don't be a sheep.
I went to university because among many things everybody I knew was going. I just followed the mass, going with the flow.
I paid minimal attention to my education in uni, failed the 2nd year and came back home a faliure. I did not think uni through, had no specific goal in mind.
The best advice I can give is take your time- it doesnt matter if you decide to study uni 2/3 years from now, it doesnt matter if you're 23 or even 30, all that matters is that you know you want to do this, why you are getting in to educational debt, why you are there!
https://www.prospects.ac.uk/graduate-jobs this government site is a good place to start. Look at what job interest you, whenever possible get in touch with someone living the career that interest you. Or take a week of work experience to see what the life is like. Be Proactive.
Don't just go to uni aiming for a 1st, Go to uni aiming for a specific job.
Take a gap year to figure this out if you need to, work part time, or full time to keep yourself busy and save money for future expenditures.
Good luck and lets catch up in a few years,
You can tell me then if my advice sucked or helped.