I recall a VC interview recently where he said (paraphrasing) not accepting cold emails and requiring an introduction is a filter that proves you know how to hustle and make some connections. That's a skill you're going to need anyway.
If you're willing to do that, start working your network of former classmates, co-workers, bosses, friends, etc. Don't be afraid to make phone calls, ask for favors, etc. If you are in the US, attended a university, and worked in tech there's really no excuse for not being able to get some warm intros to investors.
On the acquisition side, definitely pursue that but don't be mistaken thinking "interest" == "sure thing acquisition". 8-figure acquisitions don't happen without a shit-ton of due-diligence. If you feel someone is truly interested, retain an M&A lawyer and get their advice before giving access to anything beyond basic numbers.
Good luck and expect to be challenged/busy whichever way you go.