How can I count current indexing inside a loop? Is it Possible to count current indexing in a loop which starts from indexing 1 as well as 0?
Twig offers special loop variables that makes it easy to know indexing of a loop.
You can use loop.index to count your current indexing of the loop, which will starting at 1.
If You want to start your indexing from 0 so simply add 0 after loop.index like loop.index0.
There are other loop variable as well.
Like:

loop.revindex
loop.revindex0
loop.first
loop.last
loop.length