It was a mix of Spirited Away, Dragonball, and Pokemon. Then I watched a mix of Naruto, Fairytail, and FMA. I quit after the infamous fusion in FMA (I was in 3rd grade and it was definitely not appropriate for me to watch). Then SAO got me back into things in high school and I've watched so much more and developed better taste
HxH was my first and made me interested in anime. Then I watched vampire knight and then AoT so it was a good mix of stuff. Although technically I watched my first anime in 3rd grade cause my grandma had a VHS tape with dubbed swan lake and I LOVED that show (I still highly recommend it it’s free on YouTube). Just recently found out that it’s originally voiced in japanese.
I know it’s in Episode 4 of Brotherhood, but if you were watching FMA (2003) then yeah it would’ve been a little later since the 2003 anime takes its time more with the early chapters of the manga. That’s actually why I think the best way to watch FMA is starting the 2003 show and then switching to Brotherhood after Greed shows up