Elena Verna has some really good tips for ramping up in a new job in this post:
If you over-index on action, you’ll likely misfire because you’re missing context. But if you over-index on just learning, you’ll create anxiety and unmet expectations around you. It’s a tough balance to strike. Assuming you are learning at max velocity, here is how I deal with ‘take action’ part: start with protecting what’s already working, move onto quick wins, go after big bets, and finish with the strategy.
I am inclined to move the strategy piece up (see my post about product strategy) and work on that before “big bets” so that you can build confidence that you know what the product is, who the users are, and how it makes money. Small quibbles about the order of things aside, I agree with all the details!