Once you have learned how to use the interface, these sets of videos will help you to start making your own custom beats and how to sample for existing beats.
If you are beginning to learn how to remix music and Sony Acid Pro is your choice software, you should definitely check these videos out. The videos teach you the very basics on how to use Sony Acid Pro but then again, you need a really good base of knowledge before you can expand and become a pro. Sony Acid Pro has more tools than you know what to do with so take your time and check out the remixing tutorials and overviews.