How to animate characters for film? (with mixamo)

Hi,
I’ve just imported an animated character from mixamo for filmmaking ( I’m using thirdpersonBP).
I’m a beginner here and I’d like to use the easiest/fastest way to animate the character.

In default the character does “ascending stairs” movement in loop in the same location, but I want her to actually go up the stairs.

Should I use control rig plugin and edit the character movement so that she can move forward?
or
Should I retarget the mixamo character onto the default mannequin, press play, and make him go up the stairs while I shoot the scene? (Is it even possible? like can you record the scene while you’re playing with the character then add that scene in the sequencer? )

My English is not perfect, so I’d appreciate it if you could share your advice with some visuals. I’d appreciate any help.Thank you.