While there are some issues with the upgrade process these days (e.g., lack of transparency), I don't think it deserves as much worry as you may be giving it. You're almost certainly on the "behind the scenes" upgrade list, and you'll appear on the visible one as soon as you check in.
Yes, agree with this. There appear to be 7 seats available for sale in F at this time. So, I would say, as a 1K traveling on a mid-day flight, you have a good shot. Your place in line depends on (a) how many GS there are on the waitlist, (b) how many people take the buy-up offer that may be offered at check-in, and (c) what fare you paid - a higher than minimum fare will help seal the deal.
It helps to know in your mind how much you'd pay for an upgrade to first so if you see a reasonable offer at check-in, you can jump at it then. Hopefully the TOD (tens-of-dollar) upgrades won't happen as they are clearly unfair to people on the waitlist, but almost certainly something like $150-$250 may be offered.
By the way, on this flight, there appears to be a number of exit row seats available, so get yourself into one now if you haven't already!