I'm assuming you mean you've installed a bitcoin "full node" on your computer and have fully synced it with the network.

It depends on how that full node has stored the blockchain on disk and what kind of analysis you want to perform.
Blockchain is just raw data that has to be indexed if you want to perform additional data analysis on it. Full nodes like bitcoin core don't really index the blockchain. However there are a lot of information you can already extract using the RPC commands. For example: https://chainquery.com/bitcoin-cli#blockchain

What kind of information do you want to extract?