Have to convert physical windows server 2000 to virtual machine in Esxi6.1
It runs few applications like sql server.
Could I please know the steps how to make it virtualise in ESXI 6.1 ?

Very easy P2V conversion indeed.
Are you the vmware admin ?

Am not admin. Just a new project in a new role level 2 IT role.

This type of job is way above your pay grade..
NEVER practice on a production server, build something throw away and get your plan down, before attempting this task...
As Yoda says Do or do not, there is no try...
Break a production server and your life gets very interesting, very quickly...