Where are you getting stuck? I have different recommendations for general entrepreneurship, marketing/sales, business operations, team/people management etc.

A few books that immediately come to mind:

Navalmanack - nostr:npub1n5r9lpxqewnmpmux7hfdz40xecq30z52x0sef7vend6f0vdjyqds020ngn
ReWork - Jason Fried and DHH
The Advantage - Patrick Lencioni