well you need to research a little more because you can't keep any of those fish together. What size tank do you have? One gold fish grow very larger and are a cold water fish. Both the Bala shark and the angel fish grow large not to mention the Bala shark will tear the angels fins apart. They both also need a heater. Did you cycle the tank?
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I should have mentioned they're not all in the same tank. The angel and the bala in in a 2 foot tank, just while they're small. I have a 4 foot coming very shortly. The goldfish in their seperate tanks are in a 60 Litre, again I plan on upsizing.
I've cycled both tanks. Elodea and fish flakes to get things started and I've been keeping a close eye on both the water quality and the relatoinship between the bala and the angel- Believe it or not, extremely harmonious.
This time around I have a formerly estranged family member who used to keep fish and did so for YEARS, and my Mum is now keeping a 5 foot tank- tropical.
So, yes. I did my research.