There have been (quite entertaining, but utterly futile) threads about what language is the BEST (TM). I suggest that a more useful thread would be suggestions of programming tasks. These could be achieved in any language, and if the program produces the required result, then it has worked. Simple.
These should range from the "Hello Universe" type of nonsense, through "Enter values and output result" types, on to GUI and Animation tasks.
The major problem I find when sitting down to learn these modern languages (I've been coding RPG since the 80s...) is that I need something hard enough to be interesting, but achievable (by me). I suspect that most people will face a similar What Now sticking point.
A good suggestion I read was to code Noughts and Crosses (Tic-Tac-Toe). Initially read and display in text form, but then improve over time with Computer Plays, Graphic display, and then Networked Player V Player.
Anybody have interesting challenges to set ?