how do you manage your approach from T/D until touch down

[Mungo Man]

handflying - it's what you have to do when the controller takes you off the STAR [just as you've plugged in the very last detail of the entire anticipated profile] then gives you an immediate new heading, followed by more impromtu headings and altitude changes and speed reductions,

I'm all for visual approaches but why oh why advise a newbie with 11 hrs jets to hand fly when getting impromptu headings?!! Just use an appropriate vertical and lateral mode on the autopilot flight guidance panel.Save yourself some capacity to monitor what is happening.

As for descent planning, 3 times the altitude in 1000s of feet, plus a bit for tailwinds, take you time and refine it when you get a few hundred hours experience. Ask Captains for their tips, tricks and words of wisdom.