UPDATE!
I finally reached kerbin in less than 2 years, took me some tries (the delta v was not enought to slow down and get and orbit around kerbin, so i archived a reentry orbit at 4000mps).
(The brave kerbals ready to touch Kerbal land water again).
The reentry was hard and the shuttle was near to flip and get destroyed, but luckily it reached surface at the first try. I learned a lot about ksp just in this trip, thank you all, especially king of nowhere, the tips were very helpfully.