in really idiot terms no, but I can provide the short version.
flush the system, replace the receiver/dryer, add in the proper oil, evacuate the system, add in new refrigerant.
If the system isn't working, first you need to know what's wrong & fix that problem. There are many things that can be wrong, mechanically and electrically, if you're going to try & do this yourself, you've got a lot of searching & reading to do - in addition to probably new tools to buy, i.e., vacuum pump, and gauges.
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