172/182 isn't hard.
Front:
Two bolts at bottom of each strut, then allen key + swan neck spanner/spark plug socket + normal spanner to undo top hat from inside bonnet.
Remove strut. Loosen small nut on top of rubber part/bearing, then remove and swap springs, then bolt everything back on.
Strut back in place, loosely spin top hat on, then bolt up two bolts at bottom. Then tighten everything once on floor.
Rear:
Easy. Jack up car From inside boot, pull off rubber cover, undo nut (use molegrips or similar to stop shock spinning)
Place a jack under rear beam and just let it lower till you can swap the springs over.
There is a full picture guide in the guides section. But you have to be a paid up member.
The bit that is sometimes a b**ch is loosening the top hat on the front suspension. Use lots of penetrating spray, and leave the front wheels on the ground initially to loosen this.