Reminds me of myself when I was 14.
Get the tank, set it up and get everything running. Have a good long think about what you want in the tank. Wet pet? Nice display? Etc then come back here.
I'd really
really recommend a low biolad tank. A 10" cichlid and a single poly may just make it, but it has to be something you can easily maintain because as a young person there are constantly plan changes, outings, school, exams and other events that can put off a water change which could be okay or bad depending on how you put your tank up.
Next thing is availability and cost! Many people here have the fancy or obscure fish, but unless you really have a lot of money to ship fancy stuff you've gotta find what's local. I wanted all these nice fish people have, then found some hidden gems I didn't even consider when I visited a shop.
So in the end it comes down to:
-What you really like
-What can be maintained
-What's easily available to you
Hope this helps! Fellow teen out
Also, two years progress! Take your time and choose something you like and your tank will be awesome in the end!
