I would recommend getting your ham radio licence. When covid hit last year and then lockdown, I found out in the UK you could take the exam online. It's a few multiple guess questions.
The first level (foundation) is really quite easy, I think its similar in the USA.
Real time London Transport Visualization. Available on GitHub too.
vizicities.com
ViziCities is the first project to visualise the entire London Underground network in 3D using accurate station depths. Not only that, we also visualise real, live trains moving along the 3D network.