I used tung oil on the first couple bows I built, had some on hand. I used spray on poly on a couple bows. On the last couple I used a "massey finish," read about it on this site and thought I'd give it a try. I am currently putting the final touches on a bow I built in the Idaho wilderness that is going to get Tru oil. My point is if you build one bow I know you are going to build more so don't worry, you will be trying to "master" the bow building many, many, many, . . . times.
I've heard Tru oil is easy, might be a good place to start.