Hello, its possible to use ATmega328P CH340G UNO R3 as HID keyboard without extra hardware?
just bought wrong board, i see its possible on Leo board. But maybe possible and with UNO R3?
No, it's not possible. It is possible (though complicated and difficult) to do this with an Uno that that the ATmega16U2 USB to TTL serial adapter chip but your board uses the CH340G instead of the ATmega16U2.
just ordered Leonardo R3 ATmega32U4 and again need wait 3 weeks 
with this board it will work i think?
Yes, that is a good choice for HID keyboard emulation.
The waiting for shipping game is frustrating. I'm currently waiting for a lot of components for a project I'm excited about. The first Chinese shipment arrived yesterday after less than a week but from experience I'm going to guess it will be over a month for one or two of the essential parts and perhaps another will never arrive.
from Aug 16 and today i get Leonardo