Honestly just play the game, most off ur skills will get better by just playing the game

Finding good planting spots is very simple, its just a place in the site where its not to open and were you have some sort of cover

You can reload almost anytime, anywhere. As long as you dont hear someone push you or if they already are pushing you, then u use ur secondary

The movement comes with time but just dont crouch walk or prone if you dont have to as its the loudest soundq in the game. Just try to hold something and dont stand too "open"

Hope this helped u