Keto Newbie

To lose weight, you need to be in a calorie deficit. This just means "eat less, move more" (but the moving is optional). Successful people might seem superhuman, but in reality, they get things done because they don't add unnecessary difficulty to important tasks.

You can eat any way you want. Your rate of loss is limited by your weight (the more you weigh, the faster you can lose), your calorie target (the less you eat, the faster you lose). But the amount of weight you will actually lose, is determined by how well you adhere to your calorie deficit over time, so it's crucial that you eat a nutritious diet (so you don't starve, and rebound overeat), and that you eat food you like (so your don't get bored, and rebound overeat), and that you log correctly so that you're eating what you think you're eating. MFP's default macro setup is fine as a start, and probably all the way too. Keto has stumbling blocks from the get-go, as you have seen already. And it doesn't do anything special; the point is to find diet composition that fits you.

You can eat any time you want. Most people already fast for several hours every day anyway; 16 hours is nothing, you just stop eating a few hours before bed and postpone breakfast a couple of hours. And it doesn't do anything special; the point is to find a meal schedule that fits you.