If you want to breathe life into your hand-drawn characters with animation, AniMagic is worth a look. The tool lets you turn a character drawing into an animation in a few seconds. You upload a photo of your character, then the tool lets you customize the animation with multiple characters, different dance moves and backgrounds. The interface is simple enough that it's accessible to people with varying degrees of technical expertise, and you can export your creations for sharing.
Another option with a lot of power is Mango AI, which lets you create videos with talking avatars by uploading portrait photos and text scripts. It's got tools for text-to-video, photo editing and background removal, but also modules for creating animation videos and sketch character videos. The tool is useful for personal projects, but also for business, education and promotional uses.
If you want something more interactive and dynamic, you might like Rive. Although it's geared for creating interactive motion graphics and animations, it's got features like a State Machine for designing interactivity and Animate Anything for real-time animation. Rive can be used for things like game UI, hero animations and interactive elements, so it's a good option for those who want to create more elaborate animations.