As for vegetables, I missed carrots and peas too much. Mustard greens and broccoli are apparently okay, though. I could always just make salads out of baby spinach and arugula, but I suck at making salad dressings.
The rule for veggies is to avoid starch and stick to dark leafy greens.
My go-to easy dish would be a "taco salad", where I'd cook some ground beef and serve it with cheese, salsa, sour cream over lettuce. There's also lots of dishes possible with kale and spinach.
> take advantage of cheap fatty meats
Fish included! No reason to worry about eating "too much" salmon. Cook it with butter sauce and it should fit your macro-nutrient ratios perfectly.
> I prolly fucked the diet up
As another comment said, it's no wonder you felt sick. Also, the "keto flu" is a known phenomenon while your body adapts and flushes all the water out of your system. Drink a lot of electrolytes (chicken broth is a good source) and you'll feel better.
From what I've seen, your diet should be ~60-70% fat, 5% or less carbs, and ~25-35% protein. Definitely not 95% fat.
> I had several instances where my dinner in a pinch was melted down cheese and half-n-half. Your diet basically becomes cheese and avocados with some, but not too much, salmon or chicken
What about vegetables? I ate a lot of salads when I did keto. I also ate a lot of fattier meats, such as cured italian meats and ground beef. No reason to eat super lean protein when fat is most of your calories; buy the cheap fatty stuff and enjoy it. Also, eggs? I was having an omelette every morning.
> I also wonder if it's possible to work out while doing keto
It's very possible: https://www.ncbi.nlm.nih.gov/pubmed/22835211 but I doubt it would be if you're not eating any protein...