The 4* is a great flying plane, but as a first plane, I would be hesitant to fly it unless you are on a buddy box. They do take off and land like the Kadet, but they can also fly circles around the Kadet. I have a 4*120 on the table as well that I am building. Looks like you got a good plan too, the foam board works great, used the same setup when I built my P-51.
A tip to take right now, put more glue on those sheer webs, looks like you only have parts glued with Aliphatic, you will want 100% gluing on those, front and back. Also, you may want to use some fiberglass tape and CA when it comes time to put the wire joiner on your elevators, as it will work loose over time and give you slop. You would just need a strip to cover it and lap it around each side of the elevator and then glue it down good.