Welcome! Great choice to start small and add to the system. That is pretty much what I did, limiting my first few rounds of products to under $300 each (I did miss a few times but not by much). This lets you learn the ins and outs without spending too much of your hard earned money while you learn what you like. I believe there is a lot technical information to learn but that is secondary to learning what "sound" you like best…believe me, there are many excellent systems that each sound a little different…and one is "just right" for you!
Just remember the single most important thing: it's all about the music with this hobby! Play what you love, love what you play...
Best,
John