Good advice here. Building your plane is a good way to go! You will gain experience for when you have to make repairs. Designing and building a plane from scratch is a lot of work, and you are never sure how it will fly. Building from plans is a little better, but still a lot of cutting and shaping. I think your best bet is to build a trainer from a kit. All the parts are already there and cut out for you, and you can be pretty confident that it will fly when you are done. I started out with the Goldberg Eagle 63, the current version is called the Eagle 2.
https://www.towerhobbies.com/cgi-bin/wti0001p?&I=LXYXF4&P=SM
Mentioned above is the PT-40, another good plane, but I would heed his advice about building the 'sport' wing
https://www.towerhobbies.com/cgi-bin/wti0001p?&I=LXJ557&P=SM
And the SIG Kadet LT-40 flies very well too.
https://www.towerhobbies.com/cgi-bin/wti0001p?&I=LXEZHP&P=0
As for the FlySky radio- I have no experience with it. Personally I would go with a more established company, but if it works, it works.