there are actually tarot decks that are non-traditional. one of the decks i work with is the osho-sen tarot deck and while it is divided differently, has different images, and different card names, the cards still correspond to those in normal decks, they have just been associated more with the zen Buddhist teachings.
non traditional decks are used in the same method as normal decks.
while your deck is an oracle deck, you can still do spreads with them. for the most part, most tarot spreads will work for your oracle cards, but determining the meanings of the cards them selves will be different. there are some spreads that will not work or be as clear using oracle cards, but for the most part they are easy enough to modify so that they work
While the rider-waite deck is the most traditional deck, please remember that they are not the only decks or even the easiest to read for some people. when picking a deck to learn from you should pick a deck that calls toy you and that you feel you can connect with well.