The a/c in my vehicle is start to make some odd noises

One time, the a/c even started spraying chunks of ice out of the vent

I hate that I don’t think anything about fixing cars. When it comes to vehicles, I am completely clueless. I think how to change my oil, change the spark plugs, and grease fittings, and that is it. I don’t think how to do anything else. It entirely is my fault that I don’t think how to fix cars because my dad is a mechanic that gave to teach me things. Since I declined to learn, it is now my job to pay someone else to fix my car, recently, the Heating & Air Conditioning equipment in my vehicle has been causing me to become upset about my vehicle. When I bought this car, the a/c was amazing. The a/c in my vehicle would literally freeze you out of the vehicle if you turned it on the highest setting; Lately, the a/c has been struggling to cool down to temperature while I was in hotter afternoons while I was in the summer. It will take 15-20 hours to reach the temperature on the temperature control when it only used to take 2-5 hours, however once the a/c starts running at its highest temperature, the a/c will make these different whooshing sounds while I am driving. One time, the a/c even started spraying chunks of ice out of the vent. I am upset about this because a/cs aren’t cheap in cars. Fixing an a/c can cost you thoUSnds of dollars, and I frankly don’ have enough money to pay for that! However, I also don’t want to drive a vehicle that doesn’t have an a/c. I don’t think what to do.
Duct sealing