We can apply filters on any field of a Orca account. If we want to fetch a pool by its address (public key), then we need to apply where filter on its pubKey.
You can directly copy paste this code on replit and see it in action.
Once you have the pool info, you need to make sense of the data as well. For example, how much liquidity is present in the pool. You can do it by following this case study.