I'd say you're off to a good start. If there are flavors you are uncertain may be fantastic for combining, it was useful for me starting out with standalone flavors, then mixing them in my tank to get a sense of what went with what. I started out pretty low flavoring, and I did have to pour out some unvapable tanks, but with the liquids I had I started to get a sense of what types of things would work with what. I do find myself using slightly more percentages of flavor, and I did end up caving and purchasing a sweetener, but using this method I was able to get up to speed fairly quickly (I did read bunches of recipes but mainly for ideas). I then ordered a bunch more flavors and was able to fix/amend some of my earlier flavors, as well as mixing up a batch of 15 bottles that are steeping, but that I'm fairly confident I won't hate. I do write them down for posterity, but I mix the way I cook: I get a general idea of what I want, and then use ingredients and spices I have to hand to cook with.
I enjoyed getting to know mixing this way, and it was slower at first, but it really did give me a sense of what went well with what, and what WOULDN'T. I'm fairly confident in these new mixes as the ones that I amended turned out pretty much like what I was aiming for, which is a nice outcome. Unless it's a pickle flavored ejuice or something, with most of the flavorings I have now, I can make almost everything vapable and enjoyable, so I am kind of glad I approached it this way, though some folks prefer pre-measured recipes and get great outcomes that way, too.
Best of luck, I think you will have fun!
Anna