It’s pretty easy to program the Raspberry Pi Pico in Python, or you can use C or C++ if you so desire. However, if you fancy the easy language of yesteryear, you might like PiccoloBASIC from [Gary ...
Surely BASIC is properly obsolete by now, right? Perhaps not. In addition to inspiring a large part of home computing today, BASIC is still very much alive today, even outside of retro computing.