Hi,
You can ask in the forum or directly by email (jerome at hikashop.com), there is no problem.
About Skype it will be more complicated. We generally don't accept it because we can't talk to everybody at the same time, forum and emails are easier for us to provide a good support service.
Don't hesitate to ask if you think that some points of the documentation should be improve (because it should be, it's sure)
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.