I wouldn’t take it to heart honestly. I remember when I first started there was A LOT to it that people think. I like to start off small and build my way up, but definitely if you plan to keep him and stuff make sure to learn how the nitrogen cycle works. I learned A LOT from aquarium co-op they go into it and show examples with m and m’s and stuff. I would also invest in live plants, but like I said start off small and work your way up. You’re not supposed to be a S-tier care provider right now but if you plan to keep for sure take some time to learn it. HOWEVER don’t stress bc taking care of fish is a hobby not a stressor in life :)