I happen to be an aerospace engineer, and I will do my best to answer any questions that you send me. If I don't know, I'll try to find out. Please check the rest of the web site first to see if I've already addressed the question. I am working on a rocket project at home. I'm sorry, no.
Rocket propellant is highly dangerous and explosive.
A rocket is a controlled burn that can easily turn into an explosion. Even the experts at rocket design make mistakes that cause explosions at times. If you are interested if firing rockets, I suggest you pre-made solid model rocket motors from commercial manufacturers such as Estes. This is intended to make the angle at the exit plane close to zero so that the direction of flow is straight out, with no radial component. They also have a higher specific impulse so it takes less propellant to get the same amount of thrust.