Lewandowski is probably the right player for the Barcelona team. And he will be able to adapt himself to the Barcelona team very much. But it is not certain whether Lewandowski will join the Barcelona squad. He may even be with Bayern Munich next season. If that happens then Lewandowski is unlikely to be seen in a Barcelona jersey.
Both Barca and Lewandowski wants this deal to happen but Bayern want Lewandowski to continue to play for his club for the last remaining year of the contract. I am not sure what is happening behind the scenes but this obviously is putting a strain in relation ship between Bayern and Lewandowski. It is very much likely now that Lewandowski will play for Barcelona given how things stand.
Maybe next year this move is possible.