Hi!
Dennymo!
If you want to progress to more demanding airplanes like warbirds, I recommend going with a much simpler low winged, aerobatic plane first.
What you describe when taking off your P-40 is typical of how a newbie take off that do not have a feel for how to take off a highly loaded airplane.
Giving full throttle , giving full up elevator all the time...and just not realizing when the nose rises that the speed isn't enough and that the angle of attack of the wing is too much...what happens then is that one wing stalls! Snap! -Instant kit!

It's vital to know how airplanes reacts at different situations, when they stall, how they react to stall, how they react to inverted flight, hammerheads, rolls , loops, slow flights etc. To get that experience you have to reach out and try more and more "difficult" airplanes. Having flown just high winged Cub-like-planes isn't the way to go if you want the advance in this hobby.

A very go low winged airplane is a Q-500 type airplane like the one below (China -Clipper) powered by a .40 ball bearinged engine.
This type of airplane can fly rather fast, around 180km/h, and slow like a CUB, but it's much more aerobatic and responsive thus require more knowledge. It isn't at all difficult to fly but as it is faster it´s more demanding.
Then when you can do rolls, hammerheads, do inverted flight at low level, rolling circles, pylon turns etc ...then after a year or two...then try out a warbird.