Thats going to change the feel of the guitar, it comes with high grade 9s. Personally I think your strings are fine from the factory. This is not a cheap guitar you have. Between my son and I we have 4 Yamaha guitars and basses they all came with good strings. And 9s are much nicer to play, imo, than 10s.

Whatever you decide, keep practicing. That's where its at.