1. Jump over to Mixamo and sign up. Its Adobe -but this is webased and free – you don’t need Adobe CC.
Select the Characters tab at the top to choose a custom character. (You can upload you own see over here)

3. In the Download Settings window for the first animation, leave the defaults like this.
This will download the mesh, textures & animation. For subsequent animations for this character, change Skin to Without Skin to download just the animation.
3.1 Naming. In your downloads folder find the first anim you downloaded rename the file to what you want your character to be called (e.g Old_Man_Idle.fbx -> Mouse.fbx). Make a note of the old name because we need this in the next step!

UNREAL
4. In Unreal inside the Content Browser, make a new folder, open it and click the Import button.
Choose the first anim you downloaded (that you renamed in step 3.1) & in the FBX Import Options scroll down to Override Animation Name then enter the name of the anim in my case ‘Old_Man_Idle’. Then Click Import All.
I had some errors pop up on import (but I just ignored them! )






