Interns typically take these things harder and more personally than more experienced Drs so be ready!

I think what you have planned is reasonable but I would leave out the disillusioned part.

Would you be happy to speak with the senior registrar? Can I ask what specialty it is? Often the senior registrar (especially at this time of year) has either just sat their consultant exams or are about to.

If you have specific questions you want answered, go in with them written down and ask them. And keep asking until you have an answer you understand and fully answers your question. Don't be afraid to say "Can you please explain that again as I didn't understand/you response has confused me as Dr CBC said XYZ".