Yes, you have a point. Ronaldo did play at Man United but that was a long time ago. After from Man United he moved to Spain and finally to Italy. The style of play in the English Premier League is certainly different from La Liga or Serie A and because Ronaldo has played for Real Madrid for a long time, so he has to find his rhythm again in the EPL.
It's just that the time it takes for Ronaldo to adapt might not be too long because he has experienced in the EPL and I think Ronaldo is a typical player who easily finds chemistry with his teammates.
How the difference between the EPL and Serie A is of course very far and the EPL is much faster in terms of its game, maybe it will be a little awkward for Ronaldo because he will start again in the EPL but it's true what you say will not take long because you are experienced so you will know what the situation is with team.
In the EPL, a small team can make it difficult for a big team, that's because it often happens, so the game here is very tight. Ronaldo will definitely be more alert on the front lines as a goal-scoring battle.
Cristiano Ronaldo hasn't been playing in the Premier League since the 09/10 season. I don't think that the league is still the same as old times. I see it as much more challenging now. However, Ronaldo can still adapt to the league easily to be honest. Because he is not inexperienced in this league. He played here for 6 seasons in the end.