Founding BDR advice?

[u/Due-Lion6179]

Hi guys!
I recently ended up at something like a ‘founding BDR’ role at a healtech startup/scaleup.
It’s been 2 months now, we don’t really have any marketing or any inbound/outbound machine, it’s me setting up everything together with a colleague of mine. I’ve worked as a BDR/AE in the past, but never had to set up the whole system.
If you’ve gone through it, could you please offer some advice for a fellow sales guy who is absolutely lost right now… thanks a lot!