see you managed just fine,
welcome to you,we range in ages here,and from all over the world.
what a lovley christmas present a new tank
you can make it as easy or as difficult as you want really,the sky is the limit
when it comes to ideas.
you will find plenty of information from people here,and Kymmie has provided some already.
there are many people here with 10 glln tanks,including myself(although not for long)
have a look through the fresh water aquarium section,there are many threads there
with stock ideas for that size tank,and i think there are many pretty and simply decorated
on a budget there too.