I prefer wireless mice and just to clarify. I never turn it off and it lasts about a year before I have to change the battery and I use it a lot. Hours a day.

Yellow.

I made a similar decision when I was about 50. It occurred to me that it would be impossible to get hired to get into a totally different field even into a junior position with a resume filled with job titles like VP, Plant Manager, Marketing Manager, Engineering Manager, etc. So I reasoned that I needed a non-threatening way to build a network and contact people. My solution was to get a Master Degree from Georgia Tech (this was back in the day when you could get in without a CS undergraduate degree.) As part of my plan I took all the core undergrad major course in programming so I would have some version of the latest technology. This gave me unparalleled access to academics and industry people. I was able, as I approached the end of the degree program, to actually get a job offer from a big company but before I could leave they hired me to teach Computer Science which I did for about 20 years before retiring. Best professional move I ever made. Good luck.