I agree with what
@Jessica Booker has said above but just to add my two cents from a candidate perspective, I found that on my first ever vac scheme I was so concerned with converting the scheme to a TC that it actually impeded my performance. I was so nervous and concerned with excelling that I actually came across as lacking confidence in myself and it meant I didn't really squeeze as much enjoyment from the vac scheme as I could have. I think the best thing you can do is go with the mindset of just enjoying the scheme and the experience and see it as an opportunity to learn and to grow and get a better grasp of what the career is like. If you manage to convert it to a TC then that is truly wonderful but even if you don't, you will gain so much from the experience itself and that will propel you forwards both personally and professionally. I know this is easier said than done but I took this approach with my second scheme and I felt so much more confident in myself and just generally happier which I think came across positively.
I hope this helps you in some way and huge congrats on getting the vac, that in itself is an astounding achievement of which you should already be so proud.