First three levels are free so hopefully by then you’ll really know whether WK is your thing or not. Please let us know regardless - that’s always interesting i think! And if you continue browsing the forums all the better
And that’s where it will become natural quite fast to (mostly) think of the on’yomi reading when a Kanji item with pink background appears as opposed to when the same item appears as a vocab review with purple background. There’s even a script you could install that shows you explicitly whether Kun’yomi or On’yomi is asked. (KunOn+)
With the 力 example the more common On’yomi reading is リョク btw and will get used a lot in subsequent vocabulary → it helps you read those even in the wild if you don’t yet know the meaning.