You can retain your maiden name. I would suggest that you register under the Special Marriages Act 1956 instead of Hindu Marriage Act. The former is gender neutral , whereas the latter is tilted towards the husband in terms of share of property etc.
You would have to go to the registrar's office with your AADHAAR card and about 10 colour passport size photos. Then, collect the forms. Fill them up.
Then, go to a notary and prepare a signed affidavit that you are not already married and are legally fit to get married.
You'll need 3 witnesses. Then the 30 days notice period begins. After 30 days, you'll have to pay another visit to get your marriage certificate.