Whoops, didn't see the '18 CRV in your post.Hard for anyone to help you since different yrs have different procedures on changing that filter.
Google and youtube.com can be helpful.
PS: If you put your yr and model and mileage in your sig, it would be helpful.
Here is a youtube vid for a 2018 CRV: https://www.youtube.com/watch?v=8eWV_ruumCk
May be other ones, but the whole operation should be well under 10 min and, if the glove box is empty, perhaps only a minute or two if you don't vacuum out the area that the filter goes into.