advice needed for a player moving from .50/1 to 1/2 and struggling

[Adam22]

yeah he uses poker tracker but just to evaluate his play afterwards. i definetly wasn't a good player by any means when i was at 1/2 and so i'm kind of unsure of the advice i should give him since i didn't really begin to understand poker completely until i was at 3/6 for a while. even then i don't think my understanding became real complete until i was at 5/10 for a while. basically i'm kind of torn between telling him to just play at a level he's comfortable with and trying to encourage him to advance limits.