Can I use the default animations for a new 3D model

I’ve been designing a game and for the longest time I was using the default character model but I decided to add in my own model. Can I use the default animations or how do I design my own or does anyone know a free animation. I really want to keep this new 3D character. If anyone can help that would be great.

This guy does some great work and in this first video he might answer your question.

He downloads some free characters and animations from Mixamo.com and continues to give them their own movement controls, being left, right forward and backward with WASD and also a click to move function (which I personally deleted because I hate that)

I’m very new myself and don’t know if you can add animations and skins to the existing character, but in the video he shows how to download characters and animations and have them working inside the engine.

To make your own I would imagine you would need some 3rd party software

Thanks that helps a lot!!!