You've had about 100 posts of valid reasons to learn and use the tried and tested, standard, taught technique rather than devising your own methods on the basis of zero experience. Here's another one.
- You want to develop instinctive reflexes for controlling the aircraft correctly under all circumstances. You can't be switching from one method to another under times of stress like an engine failure.
- Speed control of SEP type aircraft is far more directly and responsively controlled by pitch attitude than by throttle.
- Pitching up to correct vertical profile in a low and slow situation in an SEP aircraft is potentially dangerous.
You do not yet know it all, and will make your flying training easier, more successful, cheaper and quicker by ABSORBING what you're being taught and not going freestyle. 4 landings and PPL pre-solo stage is as close to zero flying experience as you can get. Some of us with far greater experience are still actively trying to absorb information from our trainers and senior colleagues. In aviation, unless you are a test pilot, there is rarely a need to deviate from conventional wisdom which has often been hard learned over a very long time. Good luck to your instructor!