These repairs are not rocket science, but just be aware that when you compress an automotive spring, you are storing a tremendous amount of energy. If something goes wrong, or you do something stupid, you can end up killing yourself, or someone nearby.

Make sure the tools you get are in reasonably good condition. If the spring compressors are of the variety where you are using multiple screw clamps, use all the clamps that come with the tool and do a reasonable job a tightening the clamps evenly.

Until you become a pro, take your time, look at what you are doing, and understand all the potential problems.