@Vimana89 could you show some footage of that trojan? That would be helpful for us to give you tipps and advice. Also, I want to tell you what Ive learned about deltas/high alpha flying, maybe it helps you:
When learning flying with a regular plane, you first learn to control your elevator and rudder or ailerons, and you also learn how to use your elevator to keep the speed right and not slow down too much and stall. You dont really care about your throttle. You can especially see this in gliders, there you have no throttle and use the elevator for changing your speed. That is the most basic flying to learn and thats why learning with gliders isnt too much of a bad Idea, because gliders can make you a better pilot. The slender delta however is completely different: no matter how hard you pull your elevator, as long as your throttle is on, you can fly at any angle of attack youre fancy and the plane wont stall. In fact, you can even do whole controled flights with only full up-elevator. Thats because on high-alpha maneuvers, your throttle becomes equally as important as your elevator. But entry level pilots usually get confused when they need to use the throttle precisely. For an experienced pilot, its very easy, but for a beginner, its too much. Its better to learn to use one control input at a time. Also, If you can fly a regular airplane, you can fly a lot bigger range of models than If you Just focussed on the slender delta, which is very unique. In my opinion, you should learn control Inputs in this order: 1.elevator, 2.ailerons, 3.throttle and rudder, 4.ailerons and rudder coordinated, 5.everything together.
I hope that you learned something and that you understanded it, but before flying something unique, its important to get the right skills. And If youre looking into a cheap trainer, a small discus launch glider can actually teach you more about flying, momentum, speed, energy etc. than you think. I Just got the E-Flite Whipit, and actually I was impressed by how long the flighttime are with a simple toss. But you should be ok with your trojan. Does it still live?