Mike hit the nail on the head, the most important thing about IF (from what I understand) is the long window that you don’t eat, allowing insulin to drop, and allowing the body to access fat stores.
When insulin is high, the body focuses on storing energy as fat. Insulin spikes from the ingestion of food, almost ANY food. So, don’t fixate too much on protein, play with what makes you feel good, some consume as little as possible, some eat as much as possible and they adjust based on how they feel, too much protein makes me wake up at night, your results will vary!
You might have good results with IF no matter what macro ratio you are eating, I had lots of good results from a 20/4 protocol, working out fasting in the AM, eating only later in the day, and eating ANYTHING I wanted, that’s what worked for me though, you have to adapt to your unique situation.
How do you feel with your current caloric intake? If you feel sluggish/irritable/short tempered, it may be that you are not consuming enough calories. If you feel good and have energy to work out/live a full life, then screw the calculators and what random people on the nets say (including me!). The calorie calculators are ROUGH estimates, they simply can’t account for the MANY variables involved in how food is processed/meal size/your gut biology etc.
What matters if how you feel. Keep in mind that many of the physical processes may not manifest themselves rapidly. When you eat asparagus your urine stinks within hours, but, in my experience and opinion, we often react much slower to ingested calories/vitamins/supplements etc. What am I talking about? Ask those who have fasted if they’ve had a bowel movement 3-4 days into a fast, although they are not consuming solid foods, most of us have, that indicates to me, that many of our processes are slower than we think.
What all of that means is that you might consume something today (high protein) and not “feel” it for 24-48 hours so, if you feel good or bad, think back on the last 48 hours, what have you eaten, to find the answer, not JUST the most recent meal. Our bodies don’t work like the internet/social media, you don’t get an instant response to a meal, to a work out, to a supplement, no matter how badly we want it to. (Instant abs with this pill!)
That’s a bit of rambling there, sorry, bottom line, don’t get too fixated, it will raise stress and cortisol, keep track of what you are doing, pay attention to the response, adjust. KCKO!
Good luck!