Many techs are largely pointless right now. Power Generation, for example, hardly feels worth it compared to Advanced Materials Collection. The bonuses are too small to be worth the time, especially in the early game. I have been ignoring Power Generation and Planetology lately, until I am convinced that they do something valuable.
Also, as a Trader you shouldn't need to learn too many ranks of Advanced Materials Collection before working on your military capability, since you gain resources so much faster than everyone else anyways. Once you reach some kind of equilibrium in terms of being able to defend your assets, then you can start pumping those up.