Unlike companies with a formal product chain of command, there’s often not many in-house mentors to look to for product or career advice. PMs at small companies need to put in the work to identify mentors and communities that can help them improve their skills.
What it’s like to learn product at a small startup
Ashley Chang

Can really resonate with this — I think I downplayed this challenge going into the job and definitely agree that putting in the work to find mentors/communities outside of your startup can help supplement that hands-on experience and learn-by-doing mentality that you mention above