That’s not helpful when the guy’s asking for advice.Just buy some self tappers man
I got the orbix self drilling multi box assortment from YESSS a while ago, but with all selection boxes, there are certain sizes you use a lot, and others not at all. Just have to replenish the commonly used ones…. Which is different for every job.
Once you choose the most suitable size(s) then pick a good pilot drill if needed. Not too big, or the screws won’t bite.