First of all theres a wealth of information on the web about what you need to know. From basic gear needed to cheese methods and tactics. If your still doing it on normal than it shouldn't be too rough since most normal groups expect questions to be asked. If your doing it n Hard than yes people expect that you've done your research and know what needs to be done without having to ask. You say you've defeated Atheon once or twice but why? If you were looking to learn the raid you should be looking at LFG fresh run groups. Not jumping in on the final boss at the end. I'm sorry if I'm coming off as brash but this isn't the first week the raids been out. At this point the information is out there and not a mystery anymore. Don't rely on random groups and slam down on your own friends if you don't feel comfortable after reading up on whats out there.