For a "proper paper" or guide on how to actually use the software for research, refer to official documentation and academic textbooks:
: Most universities buy campus-wide site licenses. Check with your university’s IT department; you might already have free, legal access to Amos.
This is your best option. Most universities worldwide have a campus-wide license for IBM SPSS software. As a currently enrolled student, you are likely eligible to download and install a —often called the "GradPack"—for free or at a heavily discounted rate.
A free, cross-platform graphical software program for statistical analysis. It includes a user-friendly SEM module powered by lavaan , giving you an Amos-like experience without the price tag.