Let me add to this some... kind of going off subject if we are really talking about a trainer. If you actually want a different type of airplane and just unknowingly misspoke calling it a trainer... that's ok but then we need to correct it and change the subject to a sport or other type of flyer also. Therefor a discussion on the different types may be more in order for a bit.
If it's a trainer... most likely ( almost always ) it will be a high wing aircraft and it will have more dihedral than other types such as sport flyers, 3D airplanes or racers. This is a great place to start for beginning pilots of course but I know many skilled pilots that prefer them for the style of flying they like or just because of their looks even. My own father ( when he flew, at 87 he doesn't now ) as well as many other pilots I know of with decades of experience still gravitate to these because that is what they like to fly. Trainers often are made for 3ch flight ( rudder, elevator and throttle only ) but I do encourage going ahead and adding ailerons so when a pilot reaches the next stage in experience, they have that option also and can continue flying the trainer until they get another sport type airplane. The primary difference between a trainer and a sport flyer will be the amount of dihedral used in order to help the airplane self level better. Most trainers wings will also have airfoils that more flat on the bottom as well.
A sport flyer can be designed just like the trainers in style but will have a slightly flatter wing but they still will usually ( almost always ) have some dihedral still. Of course being a sport flyer also allows different wing placement ( compared to a standard trainer type ) and often different body ( fuselage ) styles. As I briefly mentioned, sport flyers often will have 4 channels and have ailerons included with the rudder, elevator and throttle controls. Just because a plane has a top wing, doesn't mean it's a trainer... but sport flyers also have mid and low wing configurations included. The airfoil type also adds a more symmetrical shape to them. Having a symmetrical airfoil will help the plane fly better when inverted ( if the pilot chooses to ). Most sport flyers will only have a semi-symmetrical airfoil but some also include a fully symmetrical airfoil ( usually for slightly more advanced flyers ).
A 3D flyer will often have a flat wing that uses an fully symmetrical wing. These aspects allow the plane to fly in whatever orientation the pilot chooses. Most of these are designed with a mid wing configuration so they fly similarly inverted and upright. These will often have motor/prop combinations that provide a one to one ratio ( or more ) on thrust. The control surfaces ( ailerons, elevators and rudder ) are also much larger than you find on trainers or sport flyers... or racers for that matter.
I'm not going into the aspects of a racer much but... I will mention they often have motor / prop combinations where they spin faster ( has a higher kv ), typically the props diameter is smaller so they can use a larger pitch on them also. I mention this because of the motor / prop you talked about earlier may be about the right size for something a bit more racy which is in part why I mentioned it was the wrong one for what you have said you planned to use it for.
Having said all of that... if you are a beginning pilot ( and not just a beginning builder ) then I'd strongly recommend staying with a trainer design as I've been talking about. If staying with a trainer, modify some of the concepts you've held previously so they fit the trainer design better so you won't be starting off on the wrong foot ( so to speak ). If you are a more advanced pilot and actually do want some of those aspects in your design, that is fine also but lets call it what it is and say it's more of a sport flyer so you are using the terminology correctly. Oh... one last thing... if it's to be a sport flyer, you still want some dihedral, just not as much as a trainer would have is all.
