What matters more for a startup: social following or business fundamentals?
You need both — a large social following doesn't guarantee a functioning business, so pair audience/brand growth with real numbers, focus, and execution.
How should a startup manage costs when just starting out?
Keep overheads as lean as possible in the early stages (e.g., working from public libraries for free wifi) rather than spending on flashy offices, and only invest in a staff member once you can no longer do everything yourself.
How do you find a good mentor or decide whose advice to take?
Look for people who acknowledge where you actually are in your business rather than giving generic advice, seek people with complementary skill sets you lack (e.g., accounting, FMCG experience), and be willing to consolidate conflicting advice and choose what applies to you rather than following it all.
How do you identify which emails or outreach requests are worth responding to?
Be wary of transactional, generic outreach (mass BCCs, 'to whom it may concern') and favour specific, personal, human-level connection; it's okay to say no to self-motivated requests.