Belmont and those near the Dalhousie building are normally the first to go. The Hub is a mixture, perhaps not as nice as Uni owned accommodation. Westpark is out of the way Unless you are doing Medicine, in which case it’s half way between Ninewells and the Uni.
If applying for accommodation now, you are likely to get the Hub. I think C and D Blocks are specifically for Freshers with a mixture thereafter. Expect to get same sex clusters in your first year.