Firstly, welcome to the forum!

I think it's a good sign that you're waking up about 4 times per night. That means you're waking up after REM cycles and after dreams. This is a perfect opportunity to write those down. Yes, I know you're tired, but LDing takes a little work, and you gotta be willing to put in the effort. Just jot down a few keywords or notes, just enough to jog your memory in the morning. Then write the whole dreams down in your dream journal.

As for the getting excited and waking up each time you're lucid - this happens to a lot of people. Basically, it just takes more practice to be able to calm down and try to stabilize the dream. The more you get into routines of recording dreams, and any techniques you use, having an LD will be more frequent and you may not wake up so quickly.

Good to hear you're at least gaining lucidity, though! That's a huge step in the right direction.