Bottom line is bring it to someone who knows what they are doing with AC. Its not easy stuff i dont care what anyone says. If you do not know what you are doing you will just end up costing yourself more money in repairs later. Having an experienced AC tech do the work you know you will be set. At this point, i would just use it till it dies. My AC clutch was spitting out brown dust from grinding away from when I got my truck with 190k till 260K when we put the V8 engine in. It never stopped working and it never gave me any trouble during that period of time so. You may have quite a while to go still before it quits.
Knowledge has no value unless its shared with others.
Exploration Machine- 02' CC V8 swap. 300K+
Portable Roller Coaster- 07' MKV VW GTI
Its another Jeep- 98 TJ