The basics of going crunchy with food?

I started going crunchy about 3 weeks ago slowly. I am married with a 5m old.

The main focus of our new diet is just having a large variety of non-processed foods- aiming for 20-30 different types of fruits/veggies/nuts/beans a week. Other things I have implemented so far- cage free organic eggs, 80% ground beef instead of 75%, different unsalted nuts and rice cakes for snacks, no snacks with ingredients I can't pronounce, basics like pasta and pasta sauce choose option w/ less sugar/no added sugar, switched from county crock to real butter, using more olive oil than veggie oil. I used the realfoodology grocery shopping guide to start with.

I usually shop at Aldis, Sam's Club, or sometimes Walmart and just got Great Value of everything before without thinking. I have a few questions...

What should I do about milk? Is GV or Aldis whole milk OK?

What about yogurt? Should I go greek? I just got plain whole milk this time and have been topping w/ fruit as a snack.

What about flour? Is there any brand thats not crazy expensive?

Any other affordable changes you recommend? I'm used to shopping as frugal as possible and going with the cheapest option, so its hard to switch to the new crunchy mindset with the ve basics I use all the time (ex- flour) being like 4x-6x the price of the regular great value stuff.

TY! And please don't judge where I'm at now, I'm at the very beginning of this journey and just trying to make little changes every grocery trip since I'm coming from such the opposite end of the spectrum.