There are multiple things for you to check out:
- our insufficient-memory tag-wiki gives you some general information, background, and first aid on the storage problem
- our app2sd tag-wiki will let you know about moving apps to your shiny new SD card
- your camera app will certainly have an option to tell it where to save new photos/videos – set that to your new card. If it does not, there are plenty of alternatives available. For some specific recommendations, see Camera software for AndroidCamera software for Android on our sister site.