Fotr me the easiest place to jact the rear of the car up is the toeing eye and it frees the rear axle,
loosen wheel nuts first,
put in gear and wedge bricks under front wheel
jack it up,
take wheels off
loosen rear dampers and remove bolt (both sides) 2 x 17mm sockets/spanner
Get a mate to stand on rear drum while you yank the rear spring out.
Put lower spring in
fasten up dampers
put wheels on
lower off jack and nip wheel bolts with breaker bar or socket.
Fronts i would take to a garage as you need spring clamps and correct tools ect. - not as task to do if your not confident you can do it. garage should charge you £30 -40 labour