Non Resident Landlord self assessment registration

I am a Non-Resident Landlord and need to register for and submit a self-assessment for rental income earned. When I registered, I appear to have registered for Business Tax under self-assessments. Is this correct? I feel as though I made the incorrect choices when registering. It now wants me to register for Class 2 National Insurance, which doesn't feel right. I would appreciate some guidance on this please.

Hi,

Please contact the Self Assessment team so we can check your account.

Self Assessment: general enquiries

Thank you.