Hi 3Dler,
Make your material - right click on the texture loader you’re using and change it to the parameter version. Name the parameter (in the bottom left box) as ImageTexture or something.
In you blueprint - probably off of the Begin Play node, make a create dynamic material node - and select your material as the source - promote the created texture to a variable. Set the material of your or whatever to texture using the set material node.
Now you can drag off the new dynamic material variable and choose set texture parameter and feed any new texture into it - in the parameter box you need to type ImageTexture. You can feed the loaded texture into .
Good luck!