First time solo travelling and first time travelling since I was younger

I’m a 21yr old male and I’m looking to travel to Vancouver. I reside in Canada but nowhere close to to Vancouver I’d have to take a train to Toronto stay the night then fly out of Toronto in theory morning. I’ve never done anything like this but I don’t know how to explain it just feels like something I need to do anyway thinking about doing it just gives me crazy anxiety like I feel like I’ll miss my flight or not be able to find an uber to the airport, or I’ll get lost in the airport or can’t find a shuttle to my hotel, or just getting overwhelmed when I get there and not end up going to see any of the stuff I want to . It’s a lot of money for four days I want to go i just idk want some reassurance I guess?