Everyone here knows I've been predicting QB1 in the first round. But IMO the Rams have targeted probably 2 at most 3 QBs that project as fits for what McVay wants. McCarthy has the talent but he's very raw in the most important part of that "fit" which is reading and going through progressions accurately and quickly. That is something that absolutely can be coached. He would need two years to develop though he could be a starter in his second year but probably not a SB contending type of QB in 2025.
The two that project as fits for McVay's current offense are IMO Nix and Penix. That said the Rams will have to move up to get either. That is why Snead was ambiguous about drafting a QB in the first round. Their targeted QB must drop and they must find a trade partner. That said I think they will try to sign Wentz to a two year deal to be a backup and potential bridge starter in 2025 should Stafford retire in 2025 as I think he will. That would allow them to take someone like McCarthy and give him two years if needed to develop should they not be able to get their targeted QB. IMO they should be able to strike a conditional deal with say the Chargers, Titans, or perhaps the Giants.
So yeah if they can I think they will take a QB in round one if a trade up can be worked out If not then CB, Edge or LT would be in play in the first round IMO.
McCarthy has the arm talent but has a lot of issues with technique and of course learning to read and go through his progressions. He also tends to bail too quickly. McVay's offense isn't predicated upon needing a running QB, he wants a pure pocket passer with good accuracy and touch.
QBs like McCarthy and Rattler have the arm talent to be a starter in the NFL. But both need to show they can improve their technique issues and look like 2nd or 3rd round picks that might surprise in their 3rd year.
Of course Snead could always trade a 5th round pick to the Eagles for Tanner McKee who really isn't a fit for their scheme. He's a pure pocket passer with good arm talent. He played well last pre-season. At the very least they would get a good backup if not an eventual starter.