The first rule for success with usenet is to have multiple block accounts on different backbones.

Some good assorted links on usenet, given that useful information about usenet seems to be somewhat diffuse:

• https://www.reddit.com/r/usenet/wiki/index
• https://www.reddit.com/r/usenet/comments/3iu46x/help_finding_top_encoders_dz0n3_etc_in_usenet/cujw2sc/
• https://hassonipulus.github.io/usenet_tree_remastered/usenet_tree.svg
• https://usenest.net/how-to-use-usenet/