Hey everyone, I am brand new to the art of bonsai. I started a tree from seed about two-three months ago and need advice.

These are the exact seeds i used
http://www.amazon.com/Japanese-Pagoda-Tree-10-Seeds/dp/B000UCPIO6/

I have looked around trying to find instructions on raising this type of tree but can't find any information, with a couple people saying there are no such thing as Japanese pagoda trees O.o

It is about 9.5 inces tall.
my camera freaked out and pictures look strange
http://i.imgur.com/nKAGcrd.jpg?1

I would love advice on when to start trimming and other general care.

the bottom of the plant is turning brownish, is this bad?
Picture: http://i.imgur.com/j6N8tEq.jpg?1

If you could also point me in the direction of a good guide for my type of bonsai i would be very grateful, Thank you.