yea, I use a lot of metaphors myself, part of it I think is just kind of how I think, but definitely the more I read over the years, the easier that became, you realize there just are a lot of stories and they all can tie together
I think in general the best thing you can do is go deep on a few subjects you are passionate about but then be pretty well read in a broad range so that you are capable of taking everything that you don’t know and pulling it into your domain through metaphor