I've been meaning to use OpenCV, as I need to sharpen up my resume again (every 3 years). Do you have any resources you would recommend?

I've used OverLeaf [1] and a tweaked Shawn Pan's 'Resume for a Software Engineer' template [2] in the past.

[1] https://www.overleaf.com/

[2] https://www.overleaf.com/latex/examples/resume-template-for-...