Search the NT. There is no allowance for the idols of Mary or praying to Mary.
The RCC has to redefine worship and introduce different levels of "devotion" and worship to accommodate their doctrines on Mary.
As it seems you are genuinely searching for answers may I recommend this website for further questions. The link below is specific regarding the Rosary and if it's scriptural or not. But there are other associated links on this and other topics at the site.
https://www.gotquestions.org/praying-rosary.html
If you have any questions or would like to discuss further I'd be glad to help. I might suggest freepmail to avoid all of the clutter that can be encountered on these open threads.
best regards
Regarding Mother Mary and the Rosary, if it were only the RCC who had these beliefs and practices, I'd be more inclined to agree that they had it wrong.
However, the Orthodox, about whom I know even less than I do about the Catholics, also have similar beliefs and practices.
As such, I can't simply dismiss these things anymore as I have done in the past.
I see where the Protestants are coming from, but now I am compelled by the volume of material throughout the ages allegedly by/coming from Mother Mary herself.
She and the material credited to her have been fairly consistent, which I also find compelling.
Equally compelling, too, has been the RCC's official reactions to Her and some of the material that is credited to Her.
For example, I just purchased To The Priests Our Lady's Beloved Sons and also what I assume is the "official" version of the same book: Our Lady Speaks To Her Beloved Priests.
Fascinating!