FTM new to exclusively pumping

So right now my son is only a week old and I pump maybe 5-6 times a day I know I should at least 7-8 but I am struggling due to being extremely tired and not having any help with during the day. I want to how do I establish or go about saving milk for him in the future because I just either feed it to him or have it in the fridge and he drinks it later. Don’t really know how to start the storing in a bag and freezing it process. I do pump at night.