I do agree that lessons on the areas you find scary is the solution, not P plates. It's great that you're taking yourself out and about to build your confidence and experience.
I'm struggling to understand how the P plates help with that. Or what you expect from other drivers?
If I'm sitting behind you at a junction silently frustrated that you didn't pull out when I might have done, how does that affect you? What difference do P plates make?
Some people are jerks, regardless of L or P plates. I particularly enjoy being beeped at for not pulling out in front of other cars and getting myself killed. I've even been beeped at for having the audacity to indicate, and then slow to an appropriate speed to safely make the turning I'd indicated. Clearly outrageous of me.
You have to learn ways to not worry about what other drivers are thinking or get flustered when somebody gets arsey with you.
I see some cars with P plates on where I wonder if the person driving is actually the person who the plates are for, and some where the standard of driving is so positively terrifying I wonder how they passed a test. And you have no idea if they passed their test yesterday or two years ago but are holding onto the plates a a safety net. It's so unpredictable I'm more wary of cars with P plates than L plates.
At least with L plates everyone knows what that means. Some people put P plates on their car as a way to celebrate passing their test, some because they were given them by worried parents, some as an excuse to drive dangerously, and some because they want other drivers to do something different...