I did mine myself.
You can either change just the track rod end of the whole trackrod like I did.
Cost me about £50 all in for the parts and tools to do it.
For a few days in advance give everything a spray over in WD40.
Undo the locknut behind the trck rod end and then undo the bolt holding the track rod end into the hub.
Hit the hub near the track rod end with a BIG hammer! It should pop out. Do not hit track rod end out of the hub as you may damage the taper it sits in
Unscrew the track rod end from the tie rod. At the end of the tie rod theres a rubber boot. Remove this rubber boot.
You will need a tool like this...
This slides down the tie rod and grips onto the ball joint on the end to undo it.
Once you got it undone prep your new track rod with some locktite...
Then screw it back in hand tight, before nipping it up with the tie rod removal tool.

Stick the boot back on it (hold it together with tie wraps).
Fill the threads on the end with copper grease.
Put a little grease over the hole of the track rod end and screw the track rod end back on.
Bolt the track rod end to the hub greasing up the taper it sits in.
Once it's all bolting up, do up the locknut tight to the end of the track rod end.
Then take it for four wheel alignment
