This is a good suggestion! Other wise you can end up going off the deep end and start drowning. It happen to me. I kept getting farther and farther away from what I started out wanting to do. Pretty sure it's my oh shiny ADHD brain but it can happen to anyone.With so many interesting things, I would probably start with the stock you have. As you say, you can learn if breeding is something you really want to do. You may also find another dozen breeding projects you want to do, and it's easier to change directions if you have not already spent a lot of effort and money setting up for one particular project. Once you know what you are doing, you can also make better choices about which birds to actually use for a project.
About choosing birds to work with, for example: if there is a breed with just the color genes you need but you hate their size or temperament or poor laying ability or something else, you can make a better decision about whether to work with them or choose an entirely different project instead. Personally, I might work with a hen who lays well but has poor temperament, and a good-tempered rooster from a poor-laying breed, but I would not take the opposite combination because I don't want to deal with a nasty rooster while waiting for a hen to FINALLY lay enough eggs that I can hatch them and go on to the next generation!
I'm pulling back now and focusing. Beryl taught me a harsh lesson.
Good luck with your endeavors!