When first starting out, I think relaxed games that help a player get used to left and right directions (side-scrolling or platform) and timing on the controls is a good start. Then evolve into camera and movement based controls.
My suggestions are starting with these:
My Brother Rabbit
The Between Gardens
Dawn (may have some camera control, but this is the most relaxing game I've played for that)
Then move on to these:
La Rana
The Room Series
Aim Labs or any shooting game that has tutorials/ practice mode (for FPS practice)
These games are found on steam. Note, most of these are casual/puzzle based.
I don't have much experience with co-op, so can't help you there. But I do like the suggestions so far based on reviews.
Maybe it's too early in the morning, but can you explain what you mean by the latter point? I'm under the impression trans treatment is provided for individuals seeking gender affirming care, with parent agreement if the individual is a minor. Your statement sounds like only the parent is consenting...
EDIT: Thanks, EatATaco. So my confusion lies in the equating puberty to hormone therapy. Similar, but not the same.
~Anti~ ~Commercial-AI~ ~license~ ~(CC~ ~By-NC-SA~ ~4.0~