Protein Shakes

Recently I've started making my own protein shakes. I'm not following a recipe or anything. I put in: 2 bananas 2 scoops of Whey protein powder 1.5 cups of Greek yogurt (22g protein, 8g sugar per cup) A splash of almond or cashew milk A small scoop of dark cocoa powder

I guess my questions are: Does this seem like a good breakfast option (I usually get a muffin at work currently)? And How far in advance can I make these/how long would they keep for?

Any feedback is greatly appreciated.

Thanks,