No one's mentioned it yet - so maybe I should
hopefully I'm not stating the obvious.
A/C work requires access to perhaps specialist equipment & skills, at least, if it's going to be done properly - it's illegal (in most countries) to vent refrigerant to the atmosphere so the system will need to be purged and the refrigerant captured before it can be disassembled, the lines and components will need to have the connections plugged or capped to prevent the ingress of moisture and/or debris, and after reassembly, you'll need to evacuate, test for leaks and then recharge.
Replacement of the receiver/dryer whilst you have the system apart would also be a good idea.
If you lack the skills & equipment, and a friend or buddy with them, try to find a shop who will work with you to handle the capture & recharge side of it, and let you handle the disassemble/reassemble side to keep the cost down.