Hi Declan. Well, vehicles are notoriously difficult, but don’t let this discourage you!
There are several ways to approach this and it’s hard to tell what is the best method ( depends among other things on the model and on the modeller…), but if you already feel that you might be on the wrong track, then you probably are…
What I do in a case like this is save this .blend file and start again with an incremental save (so you don’t have to re-set up your modelling sheets and workspace with reference pictures and so on). And start from scratch using a different method.
What works for me, for instance is edge by edge modelling. Defining major edge loops and keeping separate parts separate from the beginning (like doors and different metal plates that make up the ‘car’)…
If you feel after a bit, that there should be an easier way, make another incremental save and start over.
