It’s definitely heavier than say, a Nintendo Switch. But I got used to it quickly… and don’t have issues holding it. When playing in bed, it typically rests on my chest anyways.
As for heat, I find the fan noise (for demanding games) is more annoying than any heat being generated. And for non-AAA games, you can limit the power to keep it from running loud/warm.
Sporting, Inter Miami, and Spurs