Barcelona's main target is absolutely the La Liga title. There is no doubt about it. Because the last time they won the La Liga title was in the 2018/19 season. Since then, Real Madrid (2 times) and Atletico Madrid became the champion team. However the Europa League is important for them this time also. Maybe even if they win both titles their debt won't be gone completely. But it would still be a nice help for them to make their finance better than before.
On paper they are one of the closest teams to win the Europa League title now. The biggest hindrances are Arsenal and Manchester United. Manchester United are even their opponent in this round and they have a nice opportunity to eliminate one of their biggest rivals already now.
Beside Barcelona's main target with La Liga trophy I think if can get double trophies between La Liga and Europe League give more confidence actually with Xavi Hernandez after failure at first season without any trophies yet. I think Europe League still priority by Barcelona how ever most important with La Liga after last time winning on season 2019/2020.
I don't think easy with both trophies for Barcelona between Europe League or La Liga based on many compete team at Europe League like Arsenal, Juventus and have to win at play off round against with Manchester United.
Lead 1st standing position on La Liga with 2 points remaining from Real Madrid I don't think Barcelona without any problem yet later consistency on the top standing, actually Real Madrid have come back mentality winning and become problem at least Madrid get back to the top standing.
I don't think Barcelona will win any of this trophies, they might be sitting on top of the table for the time but I have a feeling they will drop below that position when the league resumes. The Europa league also have many other teams who are looking more dangerous and ambitious than this Barcelona team so I doubt they will be able to win the Europa league or even the La Liga title this season.