Basics of using the software

Apologies if I have sent this to the wrong community forum.

I have been working towards starting my own business in 2009. In those days would have probably used a paper-based invoicing and record keeping system. However. These days with every man and his dog having an email address (and Instagram it seems). I am planning to at the start keep neccessary records eg invoices in Microsoft Excel. Learn the procedural stuff about Accounting v16. Build up competency and confidence. Matters such backup routine etc eventually.

However, at this point. The problem is this. Boot up my Dell laptop. I get the welcome screen for MYOB Accounting. It requests a password for Explore the Sample Company. (I set up the password this year if my memory is correct.) I am wondering if I walked into this eg like a person setting up a password in Word or PowerPoint document and forgetting almost as soon as created it. Or is it a bug in the well crafted and functional program with good UI.  I am happy to share screen grabs if that is needed. To share specs eg OS, etc as well. Think they would both be helpful.

Would appreciate very kind and long baring tips as I take definite baby steps in this journey. Thank you! :)