Need to join Group Boards

I'm interested in joining a lot of group boards, they all need to be art, posters, vintage, antique, retro or illustration (even etsy if possible) themed.
I accept solidarity, I can also invite to some, also open to buying them if they are not full of bots and spammers.

Joining other boards is pretty easy. You can use a website named pingroupie dot com to find top relevant Pinterest boards.

Once you find the good ones, then you can send them request to join. Their admins will check your profile and will allow you to enter.

However, ideally you should join 10 to 12 "highly active" boards initially. There is no use joining 50+ boards and stay idle. Formula of success is join 10 to 12 very active boards and contribute in it. You will get the benefits very soon.

Consistency is the key here too. All the best!