get the lay of the land first, talk to others in your role at your org, there are in-house politics to contend with and you need to learn when and where to standup for/aginst things like your teams personal time or a unreasonable deadline.
A lot of what I have to do as Tech Lead is this ☝️ Deciding what the devs can reasonably do and what has to be pushed back. Also a lot of translations from manager/higher-up musings into actual requirements via making them up myself.