Salaam - How can I show my worth at work?

Assalamu alaikum. I’ve been at this job for about four months now. Most tasks I get take me an hour or less, and only a handful of days have been stressful or really busy. There’s a sister in our department who’s been here about a year and has really shown herself - they even moved her to another department recently. I want to earn that kind of trust and make people depend on me more. How can I prove myself at work? I’ll admit I made some mistakes at the start, which I think is normal when you’re learning. Still, before she moved, whenever I was given something, people would tell me to check with her. She’s very good at her job, asks the right questions, and when our manager talks with the team he often looks to her, like he expects her to answer. I won’t lie, I feel a bit envious sometimes, though I follow that feeling with du’a for both of our successes. What’s hard is spending eight hours at work and having almost nothing to do while she’s always busy and everyone comes to her for help. It’s a bit frustrating because I feel like I’m just there not contributing much. Any practical advice on steps I can take - skills to build, things to volunteer for, or ways to improve my reputation at work while keeping a good attitude and making du’a - would be really appreciated.