I did this for MrJamesMc who wanted to go from just side on drawings to learning 3D drawing. But here it is for any beginners out there.
Everyone starts out just drawing side views, then front and back. It's always hard moving to the next level and doing 3D - for about a month. Then you get used to it and get better and better at it.
I've made a simple 3D car template below to help you practice. Just print it out on paper and use it as a guide. The lines print very faint and you don't have to use their shapes, they are only guides. You can move the parts and lines whereever you want using sweeping curves or sharp angles etc. Don't be limited by the template, let it free you to draw what you want, but let it guide your '3D perspective'.
You can make other templates from pictures you like by using tracing paper and just tracing the minimum outlines very lightly and edges and corners and wheels etc. Then scan it as a Jpeg and print it out on normal paper.
Here's a quick few minutes ballpoint pen sketch I did over the template as an example.
And if you can't see the template on the scan, here's a high contrast copy.