If there is a Cramling involved,

Why no Cow Opening? 

You might be interested in the chapter on Pia Cramling's openings in Sadler/Regan (2016) Chess for Life.

The best case scenario for your approach is that you do in fact know all these openings well, generate some new ideas in each of them, prepare for your opponents, and choose the system that gives them the most trouble. The worst case scenario is that you know these openings superficially, your opponents prepare them better, you play hit-and-run not daring to repeat the same line against the same opponent, and shortly you run out of "new" lines to play.

Marc Benford wrote on 08/12/18 at 02:05:50:

Still searching, I see. At some point you will have to give up on the "theory light" approach and learn the actual theory heavy of at least one opening. There is no escaping it, really. Even sidelines need to be prepared well enough for facing your usual opposition. The acid test of a repertoire is playing repeatedly against a slightly stronger opponent than yourself. If you play exclusively junk or hit-and-run then eventually you will run out of openings. Instead I recommend preparing seriously and being brave enough to repeat your openings. Success in your repertoire is when your slightly stronger opponent changes their opening (unless of course they change because all your openings are bad and they can win however they please).

I was thinking about what openings I should choose as White. I had the idea of playing 1.d4 2.Nf3 and then play most of the openings that can result from these two moves, except those that involve g3. So my White repertoire would be very wide, it would include London, Torre, Colle-Zukertort, Colle–Koltanowski, and openings with c4 (Slow Slav, QGD, QGA, etc). All these openings are slow, quiet, solid, positional, strategic, theory-light, understanding is much more important than memorization. Even though my repertoire would include very many openings, I still think that I would be able to learn them all, because they are all theory-light. The point is to be impredictable and to avoid opening preparation. I won't get an advantage out of the opening, but my opponent won't get an advantage either, even if he spends hours analyzing my opening repertoire, we will just get an equal position, and I'm okay with that. I don't want to enter a memorization contest, I just want to play chess. Do you think this is a good idea?