1. If you have attained majority then you can marry a person of your choice.
2. Since your family is against your union you may marry before the registrar which is popularly known as court marriage in common parlance. The procedure has been delineated below.
3. Registered/Court marriage as you call it is solemnized under the Special Marriage Act, 1954 all such marriages can take place between any two Indian citizens as well one Indian citizen with a foreigner irrespective of their religion, caste or creed, and you can say this is the secular form of marriage available in our country.
2. Such a marriage is solemnized before the marriage officer/registrar usually D.C. deputy commissioner of the area /SDM where both or any of the parties to such a marriage reside permanently or for at least one month. Cost of such a marriage is the rate prevalent in your area.
3. Both the parties to the marriage have to file a joint application before the marriage officer along with individual affidavit attested by notary public specifying the age, place of residence, marital status(unmarried or divorcee as the case maybe) mental status(not idiot or not with unfit mind), etc. Along with this you have to give proof of age (School certificate, Passport, Pan card), proof of residence (Passport, ration card, voters ID card, rent agreement), & the application/notice of such a marriage maybe asked to be witnessed by 3 independent adult persons, affix one photograph of each of the parties & all the 3 witnesses.
4. On receiving such an application/notice the marriage officer issues a month notice regarding the intended marriage & get such a notice affixed on the notice board out side his office, a copy of such notice is sent to the marriage officer under whose jurisdiction the other party lives, also a copy is to the individual parties address. After expiry of the period of notice a date is fixed on which all the persons parties to the marriage & 3 witnesses appear again before the marriage officer who declare them married & issue a certificate to this regard.
5. If you do not have a separate residence then it is advisable to take on rent an accommodation. The rent agreement can be given as proof of residence.