97 Chevy Lumina freon recharge question

I’m trying to figure out how to recharge the freon in my 97 Lumina. From what I have been able to find out so far, I need to remove the air filter box to gain access to the low side valve to fit the freon tube on to it. Question A: How do I remove the air filter box enough to get access to the low side valve? Question B: Where in relation to the air filter box is the low side valve on the 97 Lumina? Thanks.

I generally consider this one of those things that are best left for the pros. They have the tools and experience that will help them make sure there are no leaks (AC should not use freon unless it has a leak) and the pros have the tools to hunt for those leaks.

Professional work cost more at first, but may well cost less in the long run and save you trouble.