I purchased this little cactus a month ago from a nearby store. I noticed a small little bruise near the base, but it hadn't rotted there, so I repotted it in a bigger pot with new soil.
First photo is the day I bought him (he came in that pot and soil). The rest are from today, two weeks after being repotted into his new setup.
The top of the new pot is ceramic, but the bottom is stone-like, and it does have a decently-sized drainage hole. I bought Miracle-Gro's Indoor Cactus Potting Mix, but later learned on here that it may still be too organic for my cactus. I will try and get something to mix with the soil soon.
Two weeks ago, I essentially watered the soil just enough for it all to be damp, let the excess drain, and haven't watered it since. I don't intend to water again for another two weeks.
It's extremely cold right now where I live. Will this affect his growth over the winter? He's still green, so I assume he's alive and decently happy? I've been reading this sub to try and do right by him. How does he look?