J
Jim bean 20055
. It looks like you've jumped straight in at the deep end....with a big pair of lead boots on! You've had some good advice so far and hopefully you understand and take the advice on board.
All I can add really, and I think you're already beginning to understand, is that keeping fish alive in an aquarium is extremely complex. You are very lucky in as much that the information available on line is endless thanks to the computer age we live in, and you need to take full advantage of this information.
The most important aspect of the hobby by a country mile is understanding the 'nitrogen cycle'. It is this very process which allows us to keep fish, and each hobbyist should have a good grasp of it.
You are only young and this is the start of your journey in the hobby. The more research you do the less overwhelmed and under prepared you'll feel when you have an issue, and of course we're here to guide you.