Welcome to the forums! My first experience, hmm...I think i was probably around 7 or 8, and i think my mom bought me a neon tetra or a guppy, i dont remember, or maybe it was a goldfish. It was a little tank, i had a filter and an air pump with some gravel and decoration. Ever since that day, it has been non-stop fish crazy, but i could never keep them alive, they just kept dying. Finally, when i was a teenager, i saved up enough money to buy a big tank and bought my first baby oscar, i think i had that guy for a couple years, the most out of all my fishes. He was about 3" inches when i first got him, and when i gave him away to the petstore, he was about 9" inches. That was a very sad day for me, i almost cried, lol.
Anyway, it's been about a good 7-8 years hiatus since my first pet, it's nice to be back. In a way, it's a good thing, i'm a much more mature and knowledgeable pet enthusiast now.