To be honest, one doesn't need cards of any kind if they are sufficiently immersed in the current.
As far as using playing cards, goes, you can divine with them the same way you would with the Minor Arcana of Tarot. In consequence, you will be limited to applying this to more ''mundane'' and ''day-to-day'' situations as opposed to anything ascent-based and directly-personal. In other words, you will be able to more easily define your path and your situations rather than yourSELF.
You can read the Jacks as knights or pages depending on the situation, the Queens as queens, and the kings as kings. And the Joker can serve as either the Fool, the starting point, or the Magician, the active force, and the only esoteric card to it.
Like I've explained elsewhere, divination systems tap into patterns, so using actual Tarot cards before attempting playing cards is a good idea. And not relying on the limitations of playing cards.
''Invisible Tarot'' is also a very good idea once you're proficient enough with your deck, and deeply immersed enough in the pattern through looking into it enough.
Invisible tarot being ''tarot without the tarot deck''.