I'm looking for somebody who can explain how to set up a hotkey on opera , I need it to hit tab 6?

I'm not sure you can do it directly in Opera but you can use key logger / key mapper / key repeater software for this. I used to "multibox" which involves sending keypresses to various applications at the same time. My favourite tool by far was AutoHotkey. It'll do exactly what you want and a million other things besides.Even if you don't have Opera as the active window, it'll send keypresses specifically to it (as opposed to the active application).

You can script it so that a single keypress can do everything you want or you can have it happen periodically (without you even pressing anything) or you can have it happening repeatedly. As well as multiboxing, I've had it filling in web forms for me while I was testing them. For big forms, it took me many minutes each time. AutoHotkey did it in 0.9 seconds.