My mom used to sell tropical fish as a young adult, but we never had them.
I was mowing yards and delivering papers back in the late 1960's, but I spent my money on model airplanes, rockets, bicycle gear, electronic parts and phonograph records. I couldn't have an aquarium because of my Dad's job. We traveled around way too much.
I didn't get my first little 10g from Whitie's Pets until 1975. I was 20 years old.
I was working with a fancy HP calculator (programmable!) at a drafting table, drawing trusses and walls and pe-fab things made of lumber. I'd been pumping gas and fixing cars during school, but this was my first engineering job. To celebrate, I bought some guppies and a gourami.
45 years later . . . .
We have had this current house for 18 years, and it's been paid off for years. We own a hundred fish now, but half of them are just guppies and mollies. The rest are mostly rowdy cichlids and Mooneyfish.
I wish you all such fun.