Thank you for the reply and the extremely helpful link which gives me a reference point.
I will have a look through that initially and hopefully that will help me narrow down my thought process. It's just kind of overwhelming in that the list of mods is soooo long it makes it hard to see the wood for the trees and i dont want to waste time on poor quality mods or ones that dont work properly with CM anymore.
I will start checking out the traxion mods first - I'm not sure but if you can order tracks by "likes" or something like that on traxion, that would at least avoid the worst quality mods.
i think I'm probably looking into real circuits (as they will be familiar from other games) and road layouts which are good for cruising on (i remember there is a great Project Cars road "California Highway"?) to start with.
(Catalunya will be an obvious one as i was there last year for the grand prix.)
I have found Mid-Field Raceway, thanks. And I will look for Dragon Trail as I really like that track (even with the Chicane of Death

).
I have also found a version of Transfagarasan which I used to drive on rfactor, although that looks to be an old mod.
As for vehicles, I will be looking for classics for cruising with (I remember having a Thunderbird long ago on my old laptop and an old station wagon) and more modern vehicles for track racing.
My focus is on finding good tracks first though, once I have a decent track list I can then find cars that suit the tracks.
I will start with Breathe's track list related to traxion mods first and go from there.
Thanks to both of you.
I need to restart my YT vids too. Here's a blast from the past...
PS Does FRAPS still exist? No doubt there's a much better recording method these days!