So how are you coping with the set? Have fun.
I would like to recommend you some drills on front crawls.
1) Blow slowly and longer so you can perform 4 to 6 arm cycle in one breathe and repeat.
By blowing slowly and longer, and perform your arm stroke cycle slowly, it allows your arm to feel the water longer with repeated action so you get to train better.
Once you get comfortable in your 4 to 6 arm cycle per breathe, you can then do a pattern like this, 2 arm cycle per breathe followed by 4 arm cycle per breathe and followed by 6 arm cycle per breathe and repeat.
Be mindful of your head positioning in the water and remember to maintain your body posture thru out.
In this drill set, you will realize you need to varies your breathing. Enjoy and have fun.