Well theoretically you should be able to make all the colours from that tiny stash right XD I know nothing about painting, does having the more specialised colours make the mixing part quicker?
Looks to me like you did alright with the minimal set, how do you feel?
I’m pretty happy. I have to take more time mixing so it might be better to have a few extra colours.... orange, green, purple, brown ..... the secondary, complimentary colours.