I picked up chess a few weeks ago after having a lift time of never getting around to learning it. This is great fun and I'm getting to use my newly found skill set of knowing horses move in L shapes.
EDIT: Just scraped through level 9 with zero moves left. Felt tense.
Welcome to the journey!
If you haven't seen it yet, lichess.org has a bunch of fun content
https://lichess.org/training (it's labeled "Puzzles" in the UI; there's a difficulty picker hidden in the bottom left of the page)
They have mobile apps, too, although regrettably not all content is available on the app for some horrible reason