Its not bad at all.Just make sure you have the complete front of your Forester off the ground.
10 lug nuts "wheels off".
6 top nuts for struts tops.
4 bolts for abs & brake lines.
2 large bolts & 2 large nuts for struts to knuckle.
Wiggle struts out with out ripping cv boot.
At this point if you feel secure about swapping springs,dust boots & struts tops to new struts.You will need to head to an autoparts store to get spring compressors.If not run them to your local suspension store & let them worries about it for you.