I think it will be difficult, but i believe he will manage to set up the team properly before the start of the season. Some players need to improve their form, and I have no doubt that they will. I'm placing my hopes in Mbappe and believe he will be a key player for the upcoming season. I trust that Xabi Alonso has the solution and that he will manage to win a trophy next season.
This concern arose because they lost to PSG in the Club World Cup. Previously, we've seen Real Madrid perform slightly more consistently, although not yet fully recovered. In my opinion, this isn't a significant difficulty, as they need to adapt to find a more consistent playing style. Real Madrid remains one of the favorites in La Liga, and I'm confident they can keep up with Barcelona.
The Champions League is a bit more difficult, because if several key players suffer long-term injuries, it could impact the team's performance. This is something that needs a solution so that in the event of an injury, Xabi Alonso has the option to cover for several injured players.