I've just seen that there's Annabelle 2 on Netflix. I also just have the urge to watch this movie but there's not Annabelle (1). So the first part. Is it bad for understanding the second part, if you have not looked at the first yet?
No. The second part is so-called the prehistory to part one.
You can look without problems first the second part and then the first.
I find the aha effect that you have when you first look cool. But since the first one is after the second, it should not be a problem to look at the second one first.
The second is better than the first, already scary factor. So if you want to see the best of last, take only the first.
If I remember correctly: no.
Personally, I also like the second part better.