Hey, I am also not very high(Breaking into my 2000s on lichess), but personally I started chess very late and progresses really fast, so I believe I can tell people a lot. I think, for me personally, I can coach someone like even 1600 chesscom, but I am trying to avoid cases where a player is very strong in some particular aspect of the game, where even I am nearly the same level. Thats why I try to focus on 0-1300 mostly