Gemini is the first air sign and the first double symbol — two people. It sits at the end of spring, when the world has already grown a lot of things, so the question shifts from how to start to what the relation between all this is. Gemini's core action is therefore connection: put A next to B and see what comes out.
You'll recognise it here: you can hold two contradictory ideas without discomfort, because you know the context in which each is true; you learn fast and rarely to the bottom, which isn't laziness — what you want is usually how a field works rather than to become a person of that field; and a conversation with no new information makes you drift, visibly.
Running well, Gemini is the translator: you can say the engineer's thing to the salesperson, and a complicated thing in three sentences. The more specialised the world gets, the more that's worth. Blocked, connection becomes a way of avoiding depth — jumping topic each time the core comes into view, because going in means admitting you don't understand it yet. Gemini's practice isn't monogamy of interest. It's staying with one subject long enough to see its internal complexity, at which point you stop needing a new subject to feel awake.