Being inexperienced in big tournaments like this one might be a problem for Graham Potter maybe. They couldn't beat Salzburg for example but it was his first Champions League game at the same time. Chelsea still have four more games to play here. Nothing has ended for them yet but on the other hand they are going to play against Milan two times in a row now. This is the most critical time period of the group stage for them. If they don't get at least four points from these games then their chance to move on can be much lower depending on the results of Dinamo Zagreb - Salzburg games.
Chelsea have actually made the transfer they need for solving their scoring issues. But let's see how good Aubameyang will be able to perform. If he doesn't perform like he was at Barcelona then they might still have serious issues.
Inexperience during champions league shouldn't be a problem because their opponents are not that much amazing aside from maybe Milan, so they should be second at worst no matter what. The fact that they are not shows that it is not just inexperience in UCL, but inexperience with a big club like this before.
Potter has been a manager for a while now, but he hasn't really managed a team at the size of Chelsea before, and definitely never been with a club that spent 200+ million in a single off-season. That type of size definitely requires a bit of experience, which you gain by doing it for the first time, because nobody grows knowing it, it just so happens that Potters first time will be with Chelsea.
Qualifying for the next round of the Champions League will not be too difficult for Chelsea if they are able to perform consistently well. Chelsea will still have the opportunity to play 4 matches. If they are consistent and stable they can easily qualify for the next round from second place in the table.
I'm not calling Potter a bad coach. But he is not experienced enough to manage a big team like Chelsea. And so I don't think he will be able to change the team's performance very quickly. But given enough time, he might be able to stabilize the team.
For me Chelsea has everything to qualify, I know there are those 4 games left, but for me they will win them, and I really admire the work of all the players and the technical director, and it is a great job that they have done and for me it will be one Of the surprise teams for the competition, some had no faith in them, but I really admire their ability to start and be about to qualify, the work of the technical director has been impeccable, raising a team from nothing and making their players understand each other and give their best is something that few achieve, I believe that the motivation that the players have has also had a great influence.Everyone hates Tuchel's work but for me it has been very good, the only thing is that it is no longer giving results and when that happens, it has to be replaced, but for me it did its part.
I personally didn't think Tuchel was a bad coach. He has tried his best to make the team strong. To strengthen the bonding between team players. But for some reason, he could not succeed. Players like Raheem Sterling and Emerick did not adapt well to the team. If Sterling had been able to play better, Chelsea's performance would have been stronger. Chelsea's main weakness this season is their defense. If the defenders had played well, they would have been a little higher on the points table. Looking forward to seeing what steps new pitcher Graham Potter takes to strengthen the team.