What is the process of inter-religion court marriage?

Sir, agar mai Muslim hu or meri girlfriend Hindu hai or uski or meri dono ki age puri he uski 6/07/2005 or meri 16/05/2002 he ye hmari DOB hai. Sir me ye puchna chah rha tha ki hme shadi karni he to ho jayegi kya or ho jayegi to kis act. Me hogi or uski cast change karvani he to ho jayegi ya nhi hogi vhi rhegi ya kya hoga or vaild kitne din me ho jayego