As this query seems not to have been responded to by anyone, I am filling in. Please be free to check for its correctness or otherwise from more knowledgeable persons. 1. Gothram: Gothram in general indicates the lineage of Rishis who expounded the vedas. Even if you had a gothram, (which I doubt you being a westerner) you are not aware of it. There are certain spiritual organisations like Chinmayananda Mission, Arsha vidya gurukulam etc. which have bases in USA and which facilitate anyone desirous of joining the mainstream Hinduism. As per my limited understanding, the new entrants are absorbed as adoptees of some rishi with the help of some simple ceremony. 2. Can you do the samskaras like upanayanam, marriage, namakarana etc.: It should be possible once you are in the fold of hinduism. 3. Should you ask the priest about these things: Of course, you should. At the first glance itself the priest would know that you are a new entrant to sanatana dharma and they would try to help you out.