I agree with the others, there's no harm in offering pouches but they are high in water and usually sweetened with apple. Fine in moderation though it isn't everything? 
I can really sympathise though as I wasn't a great cook when I had DS, I've had to learn really as, like your DS he has a great appetite.
Things you could try him with that are fairly easy:
Breakfast ready brek with chopped banana, cinnamon & raisin toasted with butter, porridge fingers, smooth nut butter on toast.
Lunch. Sardines on toast, one egg omelette, sandwich. All sever with veg sticks on the side.
Dinner/tea there are lots of great recipes that you can share with baby like spag bol, fish pie, roast dinner. Have a look at this cookbook fir meals that you can share.
You'll probably find that once you up his protein he might be a bit more satisfied 