Government of Maharashtra has a Name Change Service Available through their portal AAPLE SARKAR.
User manual for the said process can be downloaded from the link below.
https://dgps.maharashtra.gov.in/Pdf/E-Gazette-User-Manual-PDF-07052018.pdf
To Process your name change without any hassle you can use the services of a lot of online agencies as well do the same your self. Some agencies mentioned here are.
While processing a change of name it is advisable to ensure that the change matches the PAN and AADHAR Card. It is not necessary to match the change in name with the Armed Forces Document. But the name change should reflect the details correctly with other supporting documents. You can also use the terms like
I was know by the name or names
First Middle Last
Last First Middle ( as per format used by Maharashtra School leaving Certificate)
First Last
First
Hence forth for all practical purposes I will be known as First Middle Last.