Going back and beginning somthing new is always good. When you do something for a while, you will get better at it. You will improve. You will become comfortable in your world. You may eventually become the best and fastest widget maker this side of the Mississippi! There is something refreshing and terrifying in the experience of starting something brand spankin' new...where you have no idea what you are doing. It can be difficult to put yourself in the position of being a pure novice. Remember your first day of jiu-jitsu? I had no idea what I was getting into or doing. It was a bit unnerving getting into strange and somewhat intimate positions with strangers. Even moreso with acquaintances. When new students join the class, it reminds me of how awkward "the guard" can be for a beginner ;)
There is a very different kind of pressure in starting something new. It is a different kind of challenge. It can be difficult and produce a lot of anxiety but eventually you find that every chunk of learning is a huge new discovery that opens doors to new and unknown worlds. How refreshing!