PSG wants to focus on the Champions League and try to get the title in this tournament but they are not alone. Teams like Real Madrid also want the same thing but it was also hard for PSG to have any achievement in this tournament. Now PSG's first priority is the Champions League because they know winning the French League 1 is not hard for them considering the money they have spent on this team.
Currently, the only team they have raced with PSG is Marseille because of the good performance we saw from them but even Marseille is not strong enough to make any problem for them yet.
Though Paris Saint Germaine were able to reach the semi finals of the UEFA Champions League competition last season, I never considered them a serious contender to win the competition from the start of last season and my reason was simply because of the fact that it was Luis Enrique's first season at the club. I understand that other big clubs in the UCL are focused on winning the title as well but I think Paris Saint Germaine might shock everyone by going one more step or even two further than they reached last season by winning the competition.
In the French league, I don't think Paris Saint Germaine have any reason not to win the league title even when I know they'll face strong competition from Marseille who have been incredibly impressive this season. Luis Enrique have all the needed quality players to achieve everything he wants to achieve this season and I'll be very happy to see his PSG side do the unthinkable this season.