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.
I may not be good, but I'm slow.
The only thing worse than being an influencer
is believing one.