My first RC plane was a House of Balsa 2 x 4 glider. Built and learned to fly by throwing it a big field. Check out Motion RC
https://www.motionrc.com/Check out RC Groups if you want to sell, or buy stuff. Lots of ads
Buy a trainer of some sort to learn on. Many to choose from. Make it a high wing with tricycle gear. That way it will fly slow and ground handle well.
The B-17, not a trainer and a lot of little balsa sticks to glue together. But they are nice when finished. Do not know much about the others.
There a several clubs in CO, find one and at least go out a watch and ask questions. Our club even has a club trainer that a nubi can try with the buddy box. They might also.
I have flown RC now for over 50 years, love to see a new person come out. That is the only way our hobby will stay alive. Do not get discouraged, crashes will happen. A couple of good tricks, when the plane is coming back towards you, the controls are reversed. If you look at the plane over your shoulder, they are not reversed. Also if you keep you antenna pointed in the direction of forward flight, again, they are not reversed.
Good luck and have fun.
PS, my avatar is a MIBO Jets A-10, 120" wing span and twin Jetcat P-120 engines.