Ok so I’ve had a read and from what I can gather you’d nearly be better off in pool 4.
Top 4 teams in each league, who haven’t qualified for the Euros, playoff with 1 place in the euros for the winners. Meaning one of these will qualify for Euro 2020; Azerbaijan, FYR Macedonia, Belarus, Georgia, Armenia, Latvia, Faroe Islands, Luxembourg, Kazakhstan, Moldova, Liechtenstein, Malta, Andorra, Kosovo, San Marino, Gibraltar
The only advantage to be in higher pools would be that if most of the other teams in your pool qualified you might make the playoff without doing particularly well.
It seems like a pile of absolute bollox.