First of all congratulations for reaching $ 100 mark in Google AdSense. This means you are now eligible to get first payment from Google. Do the following and you will get your first cheque shortly.
Make sure your finalized earnings is more than 100$.
Clear any Account Hold from Google by specifying 'Tax Information'. If you are Indian then you should just provide 'No' response. The questions are mostly related to US citizen and at the end, you should type your name as 'signature'.
Hope you have properly entered your first and last name in account settings.
As you have reached 100$ you must have completed address verification by Google PIN. From next time when you change the address for communications, it is not mandatory to verify by Google PIN and of course Google will not send Google PIN!
Remove the 'Self Hold' if you set it. This specify that you do not want to restrict the payment. If you do not want to get payment on a particular month for which you are eligible for payment, you can tick mark the 'self hold' and Google will not send you any payment.
Finally check again Payment Settings and Account settings for verification from your side.
E.g. If total earnings is 101 $ once the finalized earnings is calculated on 7th of each month, Google will issue payment on 23th-25th of that month and you will get the check delivered by Blue Dart on second week of next month.
You can track your payment delivery by removing the zero before the reference number given in payment details. Enter the reference number without zero in ref. Space provided in Blue Dart website and track the earnings.