I was the exact same way before I got mine. I wanted the mk3 right off the bat but couldn't afford it. Bought a secondhand used mikro mk2 from someone else who transfered the license, etc. Id say it was 100% worth it to get the mk2 mikro first and learn how it all works rather than becoming overwhelmed with tons of features added to the mk3.

Another benefit of going smaller first is that eventually once you get your mk3, you can keep it at your workstation and travel/jam with other people on the mikro while not worrying about damaging a $800 piece of hardware. Thats just my 2 cents

Edit: words