Fun Way to Learn More German
I found a fun way to add to my German vocabulary. Switch the preferred language on Websites that have the option to German. For example, at the bottom of your YouTube main page is an option to choose which language you prefer. Change it to German and it kinda forces you to learn words or look them up. I am pretty sure you can do the same on Google as well as other sites. The more German the better!
Yes, it's a form of immediate immersion.
Nowadays many electronic devices, software programs, etc, will allow you to change their language.
Maybe start with a couple programs before changing the whole operative system.
Yes, this is a good idea. I have done it for my phone. A lot of it is 'muscle memory' anyway so you intrinsically know which buttons/option to press for apps you use a lot like Facebook/Spotify etc. Just make sure you remember how to get to the language settings in your phone to change them back if you get stuck!