Pretty much most linux distrobutions out there come with live images that you can try from a USB, especially ubuntu-based ones.
There are only a few I know of that require more advanced knowledge to install.
Linux is a very diverse and customizable ecosystem, where you can have many different kinds of GUIs and ways to install software.
If you have the patience, I reccomend you do some research through youtube & search engines on the different kinds of distrobutions availible. And if you have the internet speed and disk space, you can freely try any of them out.
A program like
rufus will let you easily put any .iso image on a USB to boot. You don't need multiple USB dives, just one, and you can overwrite it with a different .iso when you need to.