I have suggested this earlier, but it has been several years, so will put it out here again. I found that a great source for me to dabble in new skills and try different technology was the Community College where you can take individual courses without long-term commitments and costs. I was able to find evening classes in a number of different technologies that I could attend for just a few weeks commitment at a reasonable cost, often get a co-worker to attend with me, and get basic exposure to different areas. Toward the end, I was doing this entirely online at my own schedule, with no pressure, and for those of us with considerable computer power at home, this can work well. This was a great way to widen my scope in other areas while I was focused entirely on SQL Server at work for my last years. Especially for you younger folks, if a sudden need for a job change comes along, it can give you more 'curb appeal' by extending your basic skills at a low cost. When I was starting out, IBM was the dominant force in IT, so even though I took positions using other vendors technology, well before Microsoft was on the scene, I could keep my unused skills up to date just in case.
You don't have to retrain the whole world, only yourself.
The only thing worse than being an influencer
is believing one.