As I have grown older I have had to keep myself updated on lots of new skills and knowledge that I need to keep up to date. learning how to develop this website is just one of them. Learning how to manage my investments in retirement is another.
These things just did not exist when I was younger and here I am at over 70 years old and still learning.
You can take advantage of free open onlines courses on topice that will help you develop your skills and competences. MOOC courses exist across a wide spectrum of subjects that you might be interested, either learning new trade skills, a hobby or interest.
Look at this video that will tell you all about MOOC's
Look at these links to identify plenty of on line learning opportunities some are free and some chargeable, particularly if you want a certificate of completion to teh standards offered by the course provider.