We are building a PBN. Lend your wisdom!!

We are building a PBN. Want to buy an expired domain and turn it into a niche gambling blog,
all i have to do is push social backlinks and work on gambling content?
Or do I need to do some more work?
Lend your wisdom !

read these 2 guides first:

https://www.blackhatworld.com/posts/14514468/https://www.blackhatworld.com/seo/the-ultimate-pbn-guide.1360359/