OP -- you're not leaving for a few months so I wouldn't start freezing things yet.
Maybe a month before your departure start making some favorite recipes that your family loves in double batches. That way the family gets to taste your love while you're away.
It might be helpful if you mention a few recipes that you're thinking about freezing so that we can say "Yes, that freezes well", or "Nope, don't freeze that."
Another consideration of freezing foods is ease from freezer to table and the type of container you freeze the food in.
Lasagna, for example, use a tin foil pan to layer the ingredients and freeze before final cooking. Thaw in the fridge overnight and put the pan in the oven to heat. You could also have some bread prepared with butter and garlic seasoning, wrapped in aluminum foil, frozen and taken out the night before, to toss in the oven for easy warming (with heating instructions attached.)
You can bundle things together with colorful notes and instructions. Tacos, for example. Have the meat tastefully prepared with all the seasonings and frozen in a freezer bag or tupperware with a Green note saying "remove from freezer, let thaw in fridge overnight. When ready for dinner put meat in a fry pan on medium till heated to taste, stir occasionally (or microwave instructions.) Use with taco shells and refried beans that are in the pantry." Then on the (crispy corn, that lasts a while in the pantry) shells and can of beans, put a Green note on them saying "Use with taco meat." and have grated cheese and sour cream in the fridge with likewise Green notes attached.
The above examples may not be to your taste, but do you see where I'm going? Not everything needs to be frozen. Additional ingredients and notes might go a long way. For the lasagna example leave a note for your DH (on the lasagna pan) saying "Please stop at the grocery store for salad ingredients (or pre-made salad) to go with this meal" or even the taco example "maybe chop up some lettuce and fresh tomatoes for this dish."
A meal can be fresh, frozen, and delicious while you're away. Hopefully your DH is not against stopping at the grocery store for a few fresh items.
And I'm sure there's going to be some nights where he says "Whoo! Hooo! Who want's pizza!"
It's your thoughtfulness that counts . . . taking care of your family while you're away. I applaud you for this. Being prepared before you leave will bring you peace of mind while you're gone.
Good luck on your training!