There is no chance of filing divorce case before completion of 1 year of marriage. In any case you need to wait till the completion of one year of marriage.
You do not need any lawyer to settle the matter, as it would be a settlement agreement, which does not confirm your divorce. Terms and conditions which would be mentioned in settlement agreement are to settle the matter/ dispute between you and your partner regarding anything including istridhan, alimony, maintenance or any other point if you want to add.
For settlement agreement you do not need any advocate, but you need to consult with advocate for the provisions mentioned in settlement agreement, so that you won't loose any right.
Get this settlement agreement on stamp paper, signed it with witnesses. Keep it with you, and use it for mutual divorce.
For Mutual divorce after completion of one year you need to file first motion to the nearest Family court with the help of your advocate. in that motion you need to attach that settlement agreement so avoid any conflict.
Divorce decree can not be grant by any other Judge but Civil Judge/Principal Judge.