Hey there Torista 
I’m assuming you mean a tarot deck, correct?
In any case, there is nothing wrong with buying your own deck if you want! It’s actually a common tarot misconception that you have to be gifted your first tarot deck. There’s all sorts of reasons why someone might have to buy their own deck!
I say if you want a tarot deck find one that you connect with and buy it! If you’re just learning tarot, I do recommend getting a Rider Waite Smith deck, or one like it, because that’s the foundational imagery that most other decks are based on 