Thanks, I did also end up there myself :p

I even found some python parsers online that do the jobhttps://github.com/ragestack/blockchain-parser

The difficult part actually is to parse the input script.

But in the end just asked https://twitter.com/0xB10C and he help me out. :X
https://transactionfee.info/charts/bitcoin-script-total-signature-size/