Search for online documentation and whitepapers .

Most technology providers publishes documentation and whitepapers which contain everything related to new/existing features in technology.

e.g.

https://docs.microsoft.com/en-us/aspnet/core/

https://reactjs.org/docs/hello-world.html

Follow relevant people on social media platforms:

Requires a bit of research. Search for blogs and groups on twitter, Facebook, linked in and try to connect/follow people to get first hand new regarding technology.

https://www.hanselman.com/

https://weblogs.asp.net/scottgu

E-Learning Platforms :

You should invest in yourself. Subscribe to e-leaning platforms where you get first-hand video tutorials to jump-start your learning. There are many e-learning platforms which provide you trial subscriptions and offers from time to time. Some of these are:

Pluralsight

Udemy

Microsoft Virtual Academy

Next Step :

All above can give you good knowledge about subject but most of time they lack in practical scenarios and problems you might face and off-course you need to build up your social media profile to show-case your skills as most companies now a days look for social media presence to judge your skills.

Subscribe to Forums:

I believe in reaching out to problems rather than problems reaching out to me and you can find real world problems on online forums. Based on topic of interest you can subscribe to relevant forums and try reading about problems people are facing, as well as try to provide answers. Initially you might need to google about issues to gain knowledge but with time you will be ready with your own answers.

Create GitHub Account:

With time you will start gaining knowledge and start creating customized solutions to help other people in forums. Compile all your code into a GitHub repository but make sure all code is of high quality as you might be judged by a recruiter or future employer based on quality of code you are sharing on GitHub.

Start a forum:

Learning is sharing. Don’t keep knowledge to yourself. Start a blog and share information with others , build a following and who know you might un-earth an author in yourself and with time create a parallel career in training, consulting or freelancing.