Joining Accenture as a fresher, Guidence Needed..!

Hello, I m going to join Accenture from college placement as pada (Application Developer) . Current i received workday account creation and till now and only accepted loi . As per information they are going to start training before onboarding starting probably end of this month (Feb). And they said that training is going upto 15weeks(4 months estimated). Now I have lot more confusion bcz previously they mostly onboard candidates and starts training but now whats pre onboarding training. And is it difficult to pass or candidates fails. Don't to what will be the actual work after onboarding. What will be the exact process from now . What are things like primers, stream training. Some intern peoples said that prime lectures are not possible to complete.can anyone explain please 🥺