We play wizard with canadian rule for ALL, but it is always allowed to bid zero.

For the first hand, we show our card to all others, but not for our self.

Is ist possible to add such options?

Yes, it probably could be programmed as an option but there are so many other options that it becomes necessary to limit the variety. It was decided at an early stage to select a "basic" or "standard" version knowing full well that individuals would add their own wrinkles to the game. Whatever works for you.