Guys help me out with this, if anyone knows or has a answer

So I've been looking for a solution for this for ages now, it sounds silly but I really have been looking for a answer lol, so maybe you guys have experienced this but it's the level up spell cast you know the Ctrl Q or w/e it just feels a little awkward, anyway I come up with a good idea to use Space bar Or Tab Q/W/E/R by changing it in the input notepad but when I changed it and tried it out, it doesn't follow what I say (I press space Q it decided it wants to pick e instead) been puzzling me for quite a while now, but seriously I would LOVE if somebody has a answer to this or even experienced this themselves. I know it doesn't sound much lol but it is something I would like to do.

Just thought I would put this up here to see if anybody has anything.