Hi Ian / @ian.faulkner , and welcome to GADC.
Many members with the Mavic Air, so you are in good company! 
I know of at least one other M2Z owner amongst the members, too.
Da Vinci Resolve is my currently preferred video editing software - and you are right that it does take a bit of getting one’s head around - but the results from it are excellent and it doesn’t seem to kill the computer whilst making all the edit tweaks.
If you haven’t already, take a look at the Map of Members. This is a relatively new feature so not everyone is on there as yet, but I’m sure there are other members in your neck of the woods that will come and say Hi.
(Don’t forget to add yourself to that map : Members’ Location Map - A Guide)
Also, if you’ve not seen it, check out our map of places where members have flown that might be of assistance.: