1. Go to indeed.com
2. Type in 'software engineer' or 'data scientist' or something like that.
3. Don't put in a city.
4. Put the money slider all the way to the top.
5. Open a few pages of job postings in tabs.
6. Write down every word you don't know.
7. Repeat the process by searching for each one of those words you don't know and then write down additional words you don't know.
Now you have a list of what technologies are valuable in the zeitgeist and your mission is to determine why each technology exists and what it's use case is. You'll then be armed with a larger and more modern toolbox full of tools to reach for when the time comes to solve that kind of problem.
Rinse, repeat every few years.
Hope that helps someone. :)