Woohoo,
, way to go the 10" dobbie!
As Gem mentioned, atmospheric conditions will dictate how much magnification you can use. Typically that will be no more than 120X, and it doesn't matter if your scope is a 130mm, 10" or 20". On rare occassions you can go to 250X with little turbulance in the atmosphere. More than that is a very rare bird.
And wait until you pin your first galaxy! Actually, spring time is galaxy time. There is a really neat little trio of galaxies in the constellation Grus that is cannon fodder for a 10". The group is centred around NGC 7582. The trio will neatly fit in the field of view of a low power eyepiece.
Happy hunting.
Alex.