I can't really say what is good and what is bad, but I recommend to start or begin with something you will like. If you don't like the minis then no matter how great and powerful they are you will not be happy modelling and or painting them. I do understand you loving the look of the minis and they suck on the battlefield. For most armies not many suck that I do know of, but some are better than others.
Also do you care about the fluff? Read this link.
https://www.dakkadakka.com/dakkaforum/posts/list/710601.page
Shinos did a beautiful job in recapping the races.
So take a look at the minis, read the fluf and get the Age of Sigmar app to get the rules/warscrolls for free and see what the units do. Then come back and say you are interested in this, are they bad on the field or good.
That is all I can recommend for now since I never like telling someone "take this army they are strong" when there is so much someone may not like them.
I am starting a Tzeench army since I love the look of them. How they play, not sure, but just love the minis. Same for Beastriders. Just love the winter look of them when I hated the "Gutbuster" name on them because they have a big belly. At least
AoS is not so silly now as it was when it started.