I have a couple of hobbies which I do in my RV while full-timing.
1) I purchased a used keyboard and am teaching myself how to play piano. The Casio keyboard I have is for beginners and has instructional read-outs. It also has a head-phone plug so that I don’t disturb others.
2) I love to watch the night sky thru my telescope, especially during times of meteor showers. Looking at the craters on the moon, etc. really puts things in perspective for me. Lots of telescopes come with a computer cd that will tell you where planets, etc, are located in the sky on a certain date at a certain zip code.
There are also online telescope viewing clubs. “Skywatch” is such a club, as well as NASA and the Jet Propulsion Laboratory has a club/Network for ordinary people to periodically report what they see in the night sky. This club was developed after that big meteor lit up the sky and touched down in Russia. The computer software I have is called “Deepsky,” and it came with my telescope.
NASA/JPL Night-sky ProgramSkywatch Program