As I said, an angelfish will suffer at full size in that tank.
I wouldn't buy anything else for your tank at this point until you buy your own liquid test kit and are checking the water everyday to examine the parameters. Neon tetras are a poor choice for new tanks, FYI
. They tend not to be very accepting of tanks without maturity and stable conditions, and also those without lower pH's and softer water. The stock that comes in from the LFS
is also very poor sometimes. You may get lucky, but not usually. Keep a close eye on them.
If they do work out, get yourself some sort of labyrinth (ex. betta) for your show fish. But the tetras should really be in larger, more mature tanks to facilitate a larger school without maxing out your bioload.
When I was little my parents would buy whatever and throw it into our 55g. We lost a lot of fish, but they just kept buying more, and at that point I thought it was fine because I didn't really understand what was happening. The only time I can recall I really got interested in the health of the fish was when they bought a "blue lobster" and it ate my pet angelfish, which was named "Bruce." I don't know how particular your memory is on the subject of your childhood tanks, but looking back on it now I would not consider ours a success despite the fact that we had a number of fish that lived for years.