How to put a colored border around a single image on a canvas with multiple images Elements 2020?

How do I draw or place a colored border around a single image on a custom canvas with a white background that also contains other images?  How do I control the stroke and color of this frame?

I prefer a frame with a stroke on the outside and blank on the inside that can overlay if possible on the image slightly to a colored layer under the image if this is possible in Elements?

New to Elements and new to creating a custom canvas for a photo notecard in Elements.

Working on Mojave iMac.

Would appreciate step by step instruction for this. Still getting used to the tools and menus available and how to wrangle them under my control.

Thank you.