You don't say which cards, so tell us that first. Since there is lots of cards, choose one.
If you have tarot : Grab a cheaper deck, or make your own. Tarot isn't telling your destiny, in reality it shows the future of the path your on. So if you pull a card and, it states unhappiness: that doesn't mean you'll be unhappy forever, it just shows the future, from the fact of continuing along the path your on right now.
If you do tarot, i suggest looking on basics, and videos of explanation. Tarot is hard for many, it's a path, work, and gift. That doesn't mean you won't be good, but it will take practice.
For other cards like :Dutch blitz, picture cards, or playing cards. First grab a internet meaning on one, or make little alterations.
My grandma taught me a dutch Blitz fortune telling trick. Since many used too play cards back then, we didn't always have tarot, ect.
My grandma taught me a trick. You take the four colors of the dutch cards (green, yellow, red, blue) and shuffle each pack around. Each color represented something. Green :happiness/Money, investment, richness
Red: Problems, onstacles, barriers
Yellow: Life/work/home envirements, accomplishments
Blue: Moods, hopes, dreams, relastionships
We took one card from one deck each time, eyes shut. We then looked at the numbers. If you got 6 items in blue, there may be possibly six emotional adventures, red:3= 3 problems, yellow: How many life home veiws: 2
We then took all the numbers, added them up, and subtracted by 4. That would be the amount of life's structure.
In reality there are many ways, good luck.