If you check it first thing in the morning it will read too high if the oil level is "ideal" because the ideal way to check oil is when the car is parked, engine off, after the car has been driven. Give it a few minutes for most of the circulating oil to get back into the oil pan, and measure both sides of the dipstick. If unsure, get a clean shop towel/rag and wipe it thoroughly, reinsert and recheck.

Oil must be within the max and min markings. Anywhere between the two is just right. Usually the difference between the two levels is calibrated to be 1 US quart or 1 liter (they're more or less the same).

So if you read your engine oil in the morning before starting the car and it reads max, then you're good. Your car's engine oil will read somewhere in between max and min, if you recheck your oil properly.