The in-game map has information on only the places you’ve visited. There’s a minimap that can work kind of like a compass. That cube quest was super frustrating the first time I did it. If you spend more than an hour on it I recommend just looking it up on the wiki. It’s one of the first main quest missions.
When I started MW the first time and came back to it later, the biggest turn off was the attacks not connecting. But as long as you can accept that every attack has a dice roll happening in the background it’s fine. Also recommend using a map on a second monitor, since you got a physical version when you bought the game originally.
The attacking stuff is most noticeable at the start, but as you level up your skills you’re gonna connect almost every attack.