knocking over bumps

Afternoon peeps. Hope everyone's well. I've had a few problems with my freelander when going over small bumps and lumps. It's as though the front wheels are going to fall off lol. I can also feel it through the foot pedals. Anyway I changed my drop link arms both sides with some help. However the issue is still there all be it not quite as bad. I've been told it could be the anti roll bar bushes. Now I'm no mechanic and have very little experience in the vehicle mechanics field. Apart from keeping my fluid levels topped up. But I'm fed up of lining garages pockets probably like everyone else. So thought I'd have a go myself. Now do I need to raise the wheels off of the ground or is it best to keep the weight on the wheels? also is it just a case of getting the nuts undone slipping the old bush off and slopping the new one on. Tighten the nuts and do the same the other side or is there more to it. I've found what's supposed to be a simple job turning into a frantic throwing session of spanners and lots of swear words. Lol Anyway thanks in advance for any help.