PCB design DesignSpark PCB PRO is not really a new and totally different from our current free DSPCB software. It is just feature richer version of DSPCB dedicated to more advanced and requiring customers who also usually need to prepare their designs according to specific requirements for serial production of their product.
All basic functionalities from free DSPCB you are familiar already, like starting new project, capturing schematic, routing PCB, managing libraries will work similarly.
Just start using it and exploring new functions right away. Use embedded help file (or simply F1 shortcut key) to top up your knowledge whenever you need more information.