Hey, welcome and good luck!
I just started my first mod a few weeks ago, i do have a background of 3D with my daily job, but still had a lot to learn. And as said above, with many tutorials available online, you can find almost everything you need to complete a project, slowly, and starting with the simple things.
I would say, a track should be more simple to achieve 3D wise (lot less complicated shapes to model) but that being said, i've never done one!
the community here and on AC forum is very helpful, so you won't be alone in the process
Another thing, keep in mind it takes time. I did spend a lot of hours, probably more than i thought initially, but once you start seeing the result, the progress you make, and finally having a first rough 3D inside the game, oh boy it feels good!