My father passed away, butt cancer.

That's the number one thing too that natural health gurus talk about is having a clean colon.
Will still do eggs, cheese, milk...
Alight here's my advice.
Get your food from the farmers market if you have one and support the local small guys in your area. Avoid vegetables and fruits grown with hormones. Be a smart shopper too. Learn what season the fruits you want are grown in typically. I remember the Bp oil spill they had a bunch of fish and shrimps sales here and I was like

at my relatives. Places that didn't even originally sale shrimp was selling shrimps lol it crazy. They said they threw the fish out but I don't believe them especially not after seeing all these places all of sudden have mega sales on something that should've been scarce. So be congtive of what's going on in the enviorements of where you get your food from don't have to be a tree hugger or whatever.
Start eating bee pollen it has nearly all the nutrients you need. As well as Sea moss, Wheat Grass, & Goji berries too. You should look into fasting too. I fast the last 3 days of every month. I don't eat anything solid and get most my nutrients from blended juice and spring water. I don't ever feel weak I don't even feel hungry.
Here's some people I think you should checkout. And with diet you will hear conflicting viewpoints it's best to work with what works with you. I can't digest certain foods well but othrs I can. Everyone is a bit different.
Elijah muhammad was for the pescetarian diet but he also advocated eat once a day. This is a little skit from the boondocks about his book.