Cars are very specialist and unless you are a mechanic, there are some jobs best left to the experts. Some jobs are perfectly possible for you to do yourself though, and will allow you to save money on the fees charged by garages and mechanics. In this case, it would be annoying to know you had paid over the odds, so learning more about what is possible will help you as a car owner.
As a general rule, anything to do with the brakes should be handled by a professional. This is because these are integral to safety and anybody without experience shouldn’t be tampering with brakes. The same goes for engines and engine components – save this for an expert.
Small parts, such as bearings and wheel hubs and caps can often be replaced by car owners. You can usually order the parts that you need online and can find detailed instructions on how to fit them.