Thanks, im really new, so even if it is really small can I start prunning it and wiring it like just now?
No. This tree is too young and fragile. Don't prune or wire - you haven't even learned how to prune or wire yet; pruning and wiring it now will stress it too much and it will die.
Leave it alone. Let it get accustomed to your environment (You do know it belongs outside?).
Water and fertilize it (look up the care guidelines for Junipers, to know what/when/how much to water/fertilize).
Don't do anything else, leave it alone for a year. Just let it grow.
This will give you the time to learn how to develop a trunk, how to select branches for future development, what a sacrifice branch is, what foliage pads are. etc... After that year you have learned to take care of your plant, and you may want to start some work on it - or you may decide to let it grow even more.
Don't rush. Take your time. Study and learn what bonsai really is.