Looking for some mechanic help if want side work I need to fix my AC its leaking slightly 09 impala

I think I know where there a fitting on the radiator I couldnt put back on hard to explain reach out if you want side work and can help me out $ I filled it up it worked for a few weeks then stopped working. Its so low the clutch wont engage so that was a pain filling it up like that. It finally engaged once I filled it up with the air on.