If you aren't picky, you can switch between the 10's & 9's with no adjustments, assuming your intonation adn action and relief are all good now. However, there is a lot of difference in tensions between the 9's and the 10's. I would suggest just stick with the 9's, but don't throw out the 10's, you might want to experiment with them one day.

For more general info on guitars, you could try Google & YouTube searches.