Help!

Thanks for the videos. The catch drill will hopefully help with pulling more water. But I did notice that my head is too far out as compared to the total immersion video. Which is probably dragging my legs down too. Is there a drill to fix that? I'm 41. When I started swimming 3 years ago I was able to swim 3 lengths of the pool before I was gasping for air. Now I swim 3-4 times a week for 1/2 an hour. In half hour I swim 1200-1300. My short term goal is to swim 1500 in under 1/2 hour. Long term goal is to swim a mile in that time. Unfortunately I'm not sure I can devote more time to training than 1/2 an hour 4 times a week. Would you say that my goals are achievable in the next 2 years?

Thanks for the videos. The catch drill will hopefully help with pulling more water. But I did notice that my head is too far out as compared to the total immersion video. Which is probably dragging my legs down too. Is there a drill to fix that? I'm 41. When I started swimming 3 years ago I was able to swim 3 lengths of the pool before I was gasping for air. Now I swim 3-4 times a week for 1/2 an hour. In half hour I swim 1200-1300. My short term goal is to swim 1500 in under 1/2 hour. Long term goal is to swim a mile in that time. Unfortunately I'm not sure I can devote more time to training than 1/2 an hour 4 times a week. Would you say that my goals are achievable in the next 2 years?