Joselu wants to impress Ancelotti as much as possible to get more chances to play. His goal with a bicycle kick in a friendly match recently was really worth watching honestly. He can surely find chances this season but not in the Champions League most probably. I mean they will sign a much better striker soon and Joselu's chance isn't that high as long as that new transfer can't play for a reason.
Joselu is on loan at Real Madrid as well so Ancelotti would use him as a second option most of the time. He must be aware of that already before coming here. I don't think he would mind this either because he can still win championships with this team until his loan period comes to an end.
Joselu is an excellent player. He was quite successful with Espanyol. Espanyol's team was pretty weak overall. He managed to score 16 goals in his last season with Espanyol. And the important thing is that Joselu's fitness is good enough. He can serve Real Madrid for a long time. If Ancelotti is able to use Joselu properly, and if Joselu can adapt himself to the Madrid players, I believe he will be able to score a lot of goals. Joselu has this ability. But we still don't know if he can adapt to the Madrid players. But I am quite optimistic about Joselu.