I’m starting my training contract soon. I’d like to know what I can do to prove myself in my first seat?

Firstly, congratulations! Starting a training contract is a huge achievement.

One thing I'd encourage you to remember is that a training contract is exactly that: training. You're not expected to know everything from day one and nobody is expecting you to perform at the level of a newly qualified solicitor. Honestly, the first month of my training contract was spent meeting people, mastering new computer systems, doing online training modules and learning how to use the printer. Your first seat will fly by.