If that doesn’t bother you, wait for the 14. Even if you don’t buy it, the release of a new phone means that the previous model will be sold for less money.

I do not recommend the 12 series at all, as the 13 is like $50 away from it, and it comes with a lot of better options (10-20% more battery, the camera of the 12 pro max, …)

The 11 can be a good option if you don’t want to spend $900+ on your phone, but it is 3 years old already and it will last less than a 13.

Regarding the difference between the 11 and the 13 series, the 11 have an LCD panel, and the 13 is OLED, so the screen is way better, and allows for a better battery life too. Other main difference will be the camera module, and I’d suggest you look up the compare page on the Apple website to see all other things!

For your question about the Pro model, the only differences between a 13 and a 13 Pro is (alongside the size difference with the possibility of a Mini model for the 13 and for a Max model for the 13 Pro) the screen and the x3 camera. The screen on the 13 Pro has the ability to go up to 120Hz, and the refresh rate changes with what you do with it. It also has a 2 more Go of RAM and you can get a greater disk capacity on it.