@rileys1213 - Yes the Rachio will be a straight forward installation. You can ignore the Hunter transformer and those two yellow wires as the Rachio transformer will replace those. Looks like there is also a rain sensor in the setup that can be moved over to the Rachio as well. I can’t see what the extra terminal is for (9 zones, but 10 connections), so I’ll guess a master valve or pump start relay that will also move right over to the Rachio.
The decision that will need to be made is buy the Gen 2 version right now or wait a couple of weeks for the Gen 3 version. As it looks like there are 9 zone, the 16 zone version would be suggested.
Welcome to the community.