While your question was about practice, it's also worth pointing out that you may face problems when you go for training contract interviews in your third or fourth year.

On top of introverts not being naturals at interviews, be warned that there could be firms and interviewing partners out there who look out for introversion as a potential character flaw, and may view your ability to fit in with suspicion.

Having said that, you can get around this by putting in effort into rehearsing for the interview and learning how to come across as more charismatic and likable.