Hi
I am newbie here , always planned to buy aquarium but finally got it this time and have bigger confusion now.
Bought a relatively small tank (acrylic) 18inch wide , 16 inch tall and 11 inch depth.

quite overwhelmingly bought following fishes : 2 goldfish , 1 black goldfish , 4 angelfish and 2 sucker fish (1 black like cat fish and another Yellow stripes).

Now the tank looks overcrowded and am i confused that did i buy the right combination and number of fishes.

I understand that there are knowledgeable members who can guide me further.