New save, who dis?
So guess what guys! There's a program for android called "Game Native". It runs windows games on android, natively!
And I have a Retroid Pocket Flip 2, which is a retro handheld that runs Android.
So, I've played Stardew Valley since launch, but I played it on Nintendo Switch.
So now I'm playing on "PC" for the first time. It's the first time I can use mods!!!
So I'm only on Day 17, year 1.
So what mods should I use? How do I install them? And if you know anything differently that needs to be done on android/game native, let me know. But I can access the container, and do windows tweaks in "windows" if need be.
So. What mods do I need? I'm ok with wiping the save file if need be. I didn't get too far.
Install SMAPI and have a look on Nexus for something https://www.nexusmods.com/games/stardewvalley
Nexus mods is the place to go, as noted in another comment.
Quality-of-life mods are a good place to start. E.g. Pony Weight Loss Program so your horse can fit through one-tile gaps.
Then look at mods that expand content (Stardew Valley Expanded is a good starting point, but there are others that introduce new areas and characters). It's tempting to add a bunch of these, but I'd recommend not getting too carried away. Pick 1-2 max and enjoy them thoroughly, then next save try different ones. If you have 6 new areas and a hundred characters to interact with, it gets overwhelming pretty quickly.
There are also mods that are purely cosmetic/flavour, according to your personal taste/whim.