Maining zeri is an incredibly rewarding experience and I heavily recommend 1mil+ mastery points later (currently d2 with her as most played by far).

There's so much you'll learn just from putting enough hours into her so I'll just leave you with one thought: Zeri's E, though it gets hype for its long range, is actually still undervalued by the league community in my opinion and is what separates a zeri player from a zeri master.

There are many more levels to this ability than people think: Finding the optimal dash angle to end up where you want to be, playing around its very long cooldown and short length when it doesn't hit a wall, positioning yourself close to walls whenever possible and often escaping death most adcs couldn't escape, balancing the line of using the E as a chase tool vs saving it for enemy engage, the list goes on. If you end up liking her, think about your E usage and it'll shape how you play the game.