I'm from New Zealand, my english isn't very good either....
The wall accessory objects (canted wall, battered wall) can be accessed directly as any other object, or you can get from the Extras / Accessories / Wall Accessories pull down menu. See image below which shows the pull-down and the resulting dialogue box where you change the settings.
For an awning, if it is glass you can use a roof, say 10mm thick. Support frames can be made of any objects eg. rafters, steel beam sections, etc. or more roof objects.
Good luck, I hope this helps you.