RE: How do I get more comments and interactions.

#2
Three pro tips:
a. Inject mystery into the novel. Get people creating hypothesis about the novel's plot, character motivations, etc.
b. Inject controversy. Was the MC's decision the right one in the long run, is he a moral character, etc.
c. Ask questions and respond to feedback. Readers love the shit out of a response from the author, especially when they see themselves help craft something about the story/character/plot/etc.

RE: How do I get more comments and interactions.

#3
^^^
This

Fill your story with intrigue
Make something unique
Kill an important character (always a good one)
Respond to comments (even just to say thank you for reading)
Make your MC theorise about something and work to make it happen
Write the first comment, encouraging readers to give feedback (never delete the “first!!!” Comments, reply to them humorously: e.g. “second :P”, they’re really good icebreakers)
Dungeons, betrayal, a summoned hero, and the beginning of a magical revolution. Welcome to Era.