As mentioned not much a amurature can do. I would turn on the AC and see if the clutch kicked in and compressor running. If it is then you are most likely low on refrigerant. You can try to add some yourself to save money. If the AC works then you know your system works, however there is a good chance your fix will only last a day or so. I'd that is The case you have a leak and you might as well take it in and have a shop fix it. They will put in a dye to find the leak. Hopefully the leak is a cheap fix.