Step 1 -> Apply Online
Click the below URL
After clicking you will be seeing the below message
We have online resources on this site to answer all your visa questions. Once you determine your visa type you can pay your visa fee, access your DS-160 form to complete online, and schedule your visa appointment online.
Are you applying for a nonimmigrant or immigrant visa?
So to answer the above question please see the below
An immigrant visa (IV) is issued to a person wishing to live permanently in the U.S. A nonimmigrant visa (NIV) is issued to a person with permanent residence outside the United States, but wishes to be in the U.S. on a temporary basis for tourism, medical treatment, business, temporary work or study, as examples.
Fill the DS-160 form by clicking
After filling Print out of DS-160 Form to get the barcode
Pay the Visa Fees and info -> http://www.ustraveldocs.com/in/in-niv-visafeeinfo.asp
Then schedule 2 separate appointments
1) At the Visa Application Center - to have your photos and fingerprints taken
2) At the Embassy for the Interview - for interview
Step 2 -> Go to Visa Application Center (VAC)
DS-160 Barcode Confirmation Page
Step 3 -> Go to Embassy for the Interview