Good questions Harikesh.

In brief,

(1) - printing/creating more money does contribute to inflation, but it isn't the only driver of inflation, and nor does inflation follow all the time.

(2) the two are different -- commercial banks create money when loans are made, while central bank reserves can be created for example during so called 'quantitative easing' https://www.bankofengland.co.uk/monetary-policy/quantitative-easing