The Nikon D3300 was one of the most popular entry-level DSLR cameras ever, even many years after its initial release (2014). The reasons? A very good image quality, the crisp Full HD video mode and a microphone input. In addition, the new GUIDE mode makes it easier for beginners to get started in photography.
We generally recommend SDHC and SDXC memory cards with an UHS-I-interface and a SD Speed Class from 10/U1 or above, if you're using a Nikon D3300. More expensive UHS-II-cards do not offer any advantage in terms of speed (burst mode) or video capabilities.