If you use a BW/4HANA instance, you have to use the BW Modeling Tools (BWMT) to build your data model. You could only build Advanced DataStore-Objects (ADSO). If you create a new ADSO, you have to select a BW-Project and an InfoArea. After that you have to define a technical name and a description. You could also use a template to build your ADSO.
I described in a earlier post how to use BW/4HANA on Amazon AWS. But if you just need a developing system for some time and don't want to use BW/4HANA, you can use the BW 7.5 SP2 developer edition on a virtual machine.
After I had time in my parental leave to read proof the second edition of my book, I can say it is now finished. The second edition is now available in the store. You can download the table of content here. This version is only available here and at the moment not on Amazon.
If you have any questions feel free to ask and send me either an email or a comment. I hope to publish regularly in the next weeks so stay tuned.