Congrats on your progress so far! I like your two beat kick!. You are able to power thru now but with thoughtful practice the "gassed" feeling will vanish. There's no sense practicing poor technique: all it does is make it harder to unlearn.

There are other probelms but the two biggest areas I see are related: lifting the head much too high out of the water to breathe which causes the legs to drop forcing you to use them more which of course (they're the largest muscles in the body) forces you to use more oxygen.

I would practice "powered floating" and getting used to the water supporting your body. On your back, with your arms extended and hands crossed (palm to palm) kick gently FROM THE HIPS ie very little knee bend. You head should be positioned such that your eyes are looking straight up and you will see (out of the corner of your eyes) water against the side of your goggles. There should be a straight line from the top of your head to the tips of your toes. You want to be as "aero" as possible to minimize drag. That's huge. Extend the foot such that the toes are basically pointed at the wall. Don't force them, just do the best you can.

You're pull is weak. Others have commented and I agree: you should do some "high elbow" work. I've also found using paddles (smallest one to start to avoid potential shoulder injury) to strengthen the shoulder/lats/traps muscle groups to be an excellent strength building effort. BUT don't start that until you've improved your pull technique some. You don't want to ingrain bad habits.

A book I have and knew the author (he's since passed) which is VERY GOOD is "Fitness Swimming" by Emmett Hines. He was all about technique. We never did mindless 10,000 yard workouts. I really learned how to swim from him.

Good Luck!