Yes I have considered this and I have attempted it as well in a self-regulated environment, not a professional one. I attempted several times over the course of several weeks to potentially 2 months?
It didn't particularly work for me, I figure because 1. I don't have a professional available to help me do it, and 2. When it comes to hypnosis I have a wall where I'm slightly capable of being hypnotized and then I snap back out of it. I actually attribute that to DID stuff, dissociation versus snapping back out of dissociation, switches, etc, and adhd stuff, hyperactivity, and inability to stay focused on one task.
However if you're in it for the long haul, which you should be if you're trying to rewire your brain, you're going to find the most success by repeatedly doing the actions you want to be doing, and saying the phrases that you want to believe.
That is how you build neural pathways, that is how you pave the way for your brain and your body to believe it later. You will never get to the point that you are capable of doing and believing those things unless you start saying them when you don't believe it, and doing light versions of the wanted actions to habit-build when you can't do the whole big thing.
This is genuinely somewhat like a long haul hypnosis, the results are not immediate, however they are incredibly effective. Even in the face of near constant pushback and imposter syndrome over saying the good nice things about myself and doing the things that I wasn't capable of doing, by following this my capability in both areas has increased by about 30 to 40%. This means that I am about 30 to 40% more capable than I was 5 years ago, and I am about 30 to 40% more believing the compliments that come out of my brain and stopping the constant negativity and self-deprecation.