Difficult jobs for a beginner. It is ALWAYS better to make a mould in terms of final product quality, but it does make things more expensive. The thing with that shifter cover is it would likely need to be a 3 part mould, which isn't easy for someone with no experience. The dash would be harder again.
Have you got anything more simple that you could start with? If not, take a look at the easy composites video tutorials, specifically the 'making complex moulds' and the 'building a carbon fibre bonnet' videos. These series will cover the basics that you will need to know to get a decent result, but really the best thing is just to get some practice.