Duh..New driver. Not very technical.
Someone please tell me how to change the air filter. Not the cabin air filter behind the glove box but the engine air filter.

Should be a couple of clamps holding the air filter element plastic cover in place. The air filter location is right next to the battery. Just undo those clamps and pull up the plastic cover, remove old filter and replace with new filter. Then put clamps back together again.

What year is the CR-v. Makes a differance. The older ones like Turtlecrx said have clamps. The newer 02 and up have screws