thank you for you reply, I believe you could mark it as a possible request/issue, I really like the idea behind Grav, and since many years ago when I started to experiment with Jekyll (something related imho)
I thought that flat files/website gen were the future.
However these days and age, where we need superfast trial and error, not having a fully ready demo site on install or launch definitely increases the overhead and sort of defies the all as easy as it gets CMS concept again my humble opinions as first time user.
(since joomla, wordpress etc.. already come with zillions of ready made themes easy to customize)
All in all Grav requires specific coding knowledge whereas I can have a decent knowledge in html, css still it requires to learn new programming skills, which being a UX/UI and marketing expert are not really within grasp for obvious time/expertise constraints.
I will try to play around with html, css, js the little time I got to see what happens but its a shame that there is no ready themes with some features available