1999 Saturn SL1 Screeching A/C & clicking blower

Air Conditioning problem
1999 Saturn SL1 4 cyl Automatic 76,000 miles

I would like to know what to ask the mechanic to fix:
1) thru winter, blower would click but work
2) A/C not very cold
3) in past week, pressing the A/C button makes a screeching noise

Is the screeching from a belt possibly?
Could I use freon to cool down the temp?
Recently (past 6 months) had starter and belt replaced.

I want to make sure I know what I'm asking for so I don't get ripped off and wondering if this sounds minimal or highly problematic.

Thank you,
Sarah Nicole

PS 11 year old car but only 76,000 miles