
Well, speaking of exotic games... I decided that it was indeed time to try something new, and when my supposed OFC opponent on that low-traffic crypto network turned out to be a no-show, I thought that now is as good a time as ever to start that mahjong side challenge.
Another player sat down at a table of the lowest three-player mahjong stakes, and I joined him... I figured the button with the coins and the dollar sign should be good, and now that I am able to take a closer look, I can even make out the katakana for "Play".

All right, a third player joined, here is our very first hand. The Western-friendly symbols in the top left of the tiles are gone, but that is the least of our worries in this challenge.

First decision that involves buttons early on... I'm glad that the buttons had pictures of the tiles on them, because I knew that I didn't want that tile, so I clicked the button without any on it. After looking it up, it looks like the katakana on that one say "Pass" (pasu).

And here's an aggressive move from me early in the hand: I made a "Riichi" bet, announcing to the table that my hand is one tile away from winning and committing me to my current draw. Unfortunately, I missed the moment I clicked the button, but the sideways tile signals my bet as well.
I am aware that my draw is not very good (we are drawing for a bamboo 7, three outs left, but many draws remaining). I wanted to apply some early pressure, and I was still a little intimidated by all the foreign symbols, so I guess it was a bit of a Hail Mary.

Next intimidating looking button... I know from prior experience that you can set North wind tiles aside in three-player mahjong for extra points, so it was easy to guess that this was what it's about. I had the option of clicking on the tile instead to discard it, but I would just be throwing away free points that way.

And guess what? We won the hand, my opponent discarded the bamboo 7.
I did not get a button to click on, the win was automatic - I should find a way to disable that in the settings, there are some rare instances where you would prefer to turn down a winning hand.
My mahjong experience and limited katakana knowledge allow me to identify the scores below: 1 han for the aforementioned Riichi bet, 2 han for two North tiles, and 1 han for one dora (bonus) tile, making 4 han in total - a so-called Mangan worth 8,000 points (and I get my Riichi bet back, worth an additional 1,000).
I am a little confused by the yellow symbols below, which seem to indicate Fu, which I guess can be considered "sub-points". I thought they only apply in standard four-player mahjong, but house rules, I guess...

Good start.
And one relatively inconsequential hand later, we are potentially in the final hand of the game.
I did know what the button said here: It was "Pon", which means taking a triplet as part of your hand. My hand was pretty much face-up from that point on, it was pretty clear that I was collecting bamboo tiles, but I wanted to force a quick win to end the game.

I did not win the hand, my opponent closed off the game with a win by self-draw... but he only won the hand, the game goes to me! 
But look how close it was!
I had 41,000 points, my opponent in 2nd place had 40,700 - about as close as you can get.

And look, I dodged quite a bullet here. My opponent won with a circles 4, which I had in my hand as well, and I chose not to discard it, forcing me to give up my draw, because I figured it was too dangerous. If I had played it, I would have had to pay the 8,000 points myself, already costing me my first place. Also, I declined to discard the bamboo 8 earlier on, which also would have given him a win against me.
But yeah, we won our very first game, despite the language barrier.
How's that for a morale boost?
We only made $0.53 in profit (and got our $1 investment back), but that wasn't the point.
Finding something else to focus on really did help a lot.