It is a diyer type of job to replace the a/c compressor. I would take it and have the refrigerant removed at an a/c shop (unless you have the equipment). Get a compressor, dryer and oil. After changing out these items take it back to the shop and have them vacuum/charge it. Don't forget to add oil to the compressor prior to the installation. You will need to get underneath the car to change the compressor.
The blower problem may or may not be in the blower. It could very well be in the pushbuttom circuit board. Worst case you will need to replace it. I would suggest trying to get a troubleshooting manual.