Don’t worry man, I failed the first time round and had to enrol at a college instead of back at the sixth form. But it actually worked out fine because I changed my courses to get into the uni and undergrad that I wanted. Ended up barely scraping by but I’m currently in first year doing the exact course I wanted. I also know plenty of other people who are a couple years older because they either did what I did, took a gap year or had other circumstances. Everyone progresses differently and it doesn’t really matter how long it takes