A bare minimum of 18 which probably still won't be enough unless other results fall for us very well indeed.
A maximum return of 24 would have us not far off certain to qualify, unless other results are a freakish horror show.
Either way it's looking less likely if I'm honest.
Look at it this way as there's few combinations after such a big total from 8 games;
Anything less than 6 wins, 2 losses OR 5 wins, 3 draws, No losses; Up to 1-2% chance at best, ie Not a chance in hell.
The above; Around 8-10% chance
6 Wins, 1 draw, 1 Loss Probably 15-20% chance
6 wins, 2 draws 30-40% chance
7 wins, 1 loss 60-70% chance
7 wins, 1 draw 70-80% chance
8 wins 85-95% chance.
With the variation dependant on GD etc