ACARS:
For practical purposes in PPL nav, I would suggest you simply average the winds between the waypoints for a single wind value for each leg, remembering that you need to use the winds at your cruise altitude for the calculations. That will also give you an accurate enough answer for the written exam.
I have tried to calculate corrections for each site and apply them to parts of the flight. It is unnecessarily complicated and makes a difference of only a few degrees (usually less than 6 deg). The main thing I find is to have checkpoints reasonably spaced so you can see them from each other - in the UK that should be fairly straightforward. You'll end up flying a wind correction angle by eye.
For legs of over 300 NM I have used pressure pattern nav and ignored the winds but that generates its own problems!
Rgds
CB