A Foundation course teaches you to take ideas through different processes.
It is a concentrated year of study where you will be expected to work independently to briefs or projects and given lots of practical help and advice to improve your work. Therefore, you should do your best to get a feel for the art school, this may be from online open days or visiting the place itself. If it excites you and makes you feel that you would be supported there, these are good signs that you will feel inspired to take risks and challenge yourself in your art making and thinking. Choose an environment where you feel that you will be able to try new things, work independently and build an exciting portfolio.