I also just re-played through this, mgs1 is a fantastic game for so many reasons. It brought me back to when games were meant to be fun and not a grind fest.
I would also like to say maybe take the downtime you have now and play through the VR missions for 2, they add a lot in when it comes to functions of sneaking and playing those will really make you aware of the tools at your disposal, that’s currently what I’m doing when I feel like it.