rabbut
I don't bite, all that often...
After doing a bit of research I've decided on
A few Cardinal Tetra's
A few Harlequin Rasbora's
and a Flying Fox or shark of some sort?
These good choices? Will the Flying Fox be aggressive towards the tetra's and rasbora's?
Cardinals and harlequins are both excelent choices

apparently tiny fish like tetras are very hard to keep they need a particular water balance of acidity etc,
LMAO

Having danios as a starter is a good idea - they are good for starting the nitrogen cycle and aren't thay fussy when it comes to water. Thats what i started off with anyway.
I agree that keeping danios as your first fish is a good idea, being very hardy and forgiving of errors in maintanance. Please don't "start the nitrogen cycle" with them, as IMO this is cruelty to animals. This process intentionaly exposes them to ammonia and nitrite that will damage their long-tearm health at best kill them at worst


HTH
Rabbut