What direction do you feel that you want to go with the hobby?
Scale Aerobatics
3D
Warbirds
Scale Flying
Precision Aerobatics
Jets
Im not forcing you to choose, you really dont need to but if you have an idea of where you are headed perhaps it will help give you some options that you will be pleased with..
To be honest, the airplane you have chosen is nice and if general sport flying aerobatic is what you want then that will be a nice plane for you. It will even be ok to practice the stuff I suggest below.
But if you are interested in 3D as you mentioned then that plane will never be able to do what you aspire to do.
My suggestion if you are wanting to fly 3D is to start out learning to REALLY fly those maneuvers that Ken mentioned and fly them well.
Here are some things to cure your boredom. Dont tell me you can already do this because after a gallon of gas I 100% guarantee you you cannot, and if you think you are you need to raise your standards. This is not intended to be insulting, these are genuine suggestions on things to practice to keep you busy.
Learn to fly a 4 point on a perfectly flat line, all 4 points of equal timing and speed. No tail waggling.
Do your stall turns on a perfectly vertical line straight up and straight down. Do not use more than a wingspan to stall turn the plane into the down line. No pendulum on the way down. It should fall vertically without swinging back and forth on the tail.
Learn to fly inverted as if it were absolutely as comfortable as upright with no fear of pulling when you should push.
Learn to fly in a straight line.. And I mean really straight, fly in a straight line 50' high (not 51 not 49) and fly 75 yards away (not 70 and not 80). Fly all the way across the field from one end to the other and only use the aileron to keep the wings level. Rudder to maintain distance and elevator to make slight altitude corrections.
Learn to use the rudder to get you on heading ahead of time, ifyou setup correctly you will only need to make tiny corrections with the rudder to keep you on heading.. NEVER heading correct with ailerons. Ailerons are for banking, not steering.
Learn to do a PERFECTLY round loop and maintain the exact same distance out throughout the loop. Only use the ailerons to keep the wings level, use the rudder to keep it straight and pay attention to what you are doing to correct while inverted. Make corrections invisible.
Learn to do a LOOOOOOOOONG slow roll. Start at 1 end of the field and take the whole length of the field to do your roll. Maintain speed, altitude and heading through the entire roll..
Once you can do all of that well come back and I will get you to step 2.
See ya in 6 months

. You should have burned about 20 gallons of fuel by then and you might be getting close to doing a half decent job.
Oh, here are some more easy maneuvers to practice once you find out what they are. These are all beginner aerobatic maneuvers.
Cuban 8
Reverse Cuban 8
1/2 Cuban 8
1/2 reverse Cuban 8
2 point roll
Square loop
Outside loop
triangle loop
humpty bump
top hat
sharks tooth