To see the documentation please double-click on a PC having Windows installed (and this is the only way at this stage for you). But one step you have to do first:
When you unzip the CHM only the TOC is showing, the right information panel is blank (file not found). Microsoft is trying to protect you from CHM files (since they can execute stuff). Using the Windows built-in Zip support it makes sense that Windows security may try to stop you viewing the CHM from a ZIP.
After unzipping the CHM you need to right-click it, select properties and click the unblock button.