First of all, having a mentor is a good decision. I hope to find one that I can always ask for advise. Anyway, I agree. Acquiring a skill is a much better investment than immediately jumping into business. Skills will help you in the long run, and no matter how small your forecasted business may be, if you have the right skills and learnings, it'll be easier for you to get your goal. It is like weighing where would you risk your time, is it for the long run or for the vague immediate return. It will be a longer time for you to gain skills but it is not a guarantee either that you'll get a good return when you enter right away into business. There will always be a risk so choose the one that will help you in the long run and the will give you an edge.