OP - perhaps this real-life example (me) will give you hope that you haven't fucked up at all.
I went travelling with my BF for 18 months straight out of Uni, back in the early 80s when that was a very unusual thing to do. I had some of the best times of my life - we travelled around the world on very little money, did various odd jobs here and there to keep afloat, and learned a lesson which (IMO) has set me up for life in a way that nothing else could have done.
The lesson was "I can do anything if I put my mind to it" and it has stood me in good stead ever since.
Back in the UK I decided to train as a teacher, and then spent 3 years teaching. Realised it was the wrong career path for me. Decided to go travelling again. Travelled for a while, sometimes alone, other times with people I met on the way. Had a beautiful time, fell in love with New Zealand.
Decided I wanted to be come a Kiwi, so went back to the UK, packed up all my stuff, said goodbye to everyone and came back here to live.
Initially I got a job at an environmental agency, then I worked in HR for a government department and finally - at the age of 30-something - I found My Thing, which turns out to be web design. I've now been a web designer for over 25 years, some of it as an employee, mostly as a freelance contractor.
I own my own home (mortgage is paid off), I can work when I feel like it to some extent now. As I had a bunch of different "careers" early on, I've always assumed I have to sort out my own pension, so now I put the same amount of money I used to spend on paying off my mortgage into my investment plan. I'm doing OK.
Travelling while young gave me all of this, in a way. It gave me a sense of independence, it forced me out of my comfort zone, it taught me how to rely on myself while at the same time trusting that the Universe Will Provide (yeah, sorry, bit woo!). It showed me that anything is possible. It opened my eyes to new cultures, new ways of life, new ways to live and new ways to approach the world.
I was braver back then than I am now, and I did so many amazing things on my travels. I was free to go wherever took my fancy, with whoever I liked, for as long as I wanted to. There was nothing holding me back like there would be now. I sailed a two-person yacht to New Caledonia, rode elephants through the jungle in Thailand, picked grapes in 100-degree temperatures in Australia, lived on a commune in the back of beyond in NZ, went to a Royal Wedding in Bali and jammed with log drummers on the beach in Tahiti.
Yeah if I did it now I'd have a heck of a lot more money to do it with - but for me, back then, the most valuable thing I had, and which I spent with great glee, was time. And, if I hadn't gone travelling back then, I wouldn't be a Kiwi now.
Who knows what adventures await you - but my advice to you is to take your opportunity now. Go travelling. Find yourself. See the world and figure out your place in it. You won't regret it.