Rebecca Starr is amazing, and in the video she has some great tips too!! However, if you are new to bridges then this might be a bit too advanced. Wrists can hurt when lack of mobility prevents you from using a neutral position for the wrists. It's not so much about needing super strong wrists, but proper placement (although you do need a lot of over all strength for this pose). Tightness in the shoulders, chest, triceps, hips and limited back mobility can prevent proper wrist placement along with weakness in these muscle groups. Also not spreading the fingers wide can cause pain too. You can try using yoga blocks as well.
If you are new to back bending it would be a good idea to start with a few less challenging stretches (you can find less intense stretches in the lessons here). When these become more comfortable then move on to the bridge, starting with the head on the floor variation, working up to full bridge. Don't forget to work on stretches for the shoulders, chest, triceps and hip flexors. https://www.studioveena.com/img/smilies/icon_flower.gif