There are two types of sticks, nylon tip and wooden tip. Nylon tip sticks sound brighter and cleaner, which is most noticeable when playing on the cymbals.
When choosing a pair of sticks they should be of the same length, weight and straightness (test for straightness by rolling the sticks over a flat surface, if they don’t wobble they are straight). A good starting stick would be a size 7 A (marked on the side of the stick). As you progress you will be able to try different sizes and see what feels best to you. Try both nylon tip and wooden tip.