I used to play mahjong every weekend for a couple of years.
I’m carp at strategy games, useless at chess etc but did quite well with a strategy game called Rubic’s Illusion. It’s a version of “Four in a row” but half the board is a reflection in a mirror. Pieces might be your colour on both sides, yours on one side and your opponents on the other or both colours on one or both sides.
You build rows on the board and in the mirror. Reflected pieces are as valid as real ones. You can still buy a set for less than a tenner.
I enjoy correspondence and debate to stretch my thinking. Making stuff and solving problems while making stuff works too.