Furmaata Islaamaa Gafachuu - Yaada Naa Barbaachisa, Assalamu Alaikum

Assalamu alaikum, this summer, I converted with a friend's help, but I’m keeping it on the down-low 'cause my parents are atheists, really strict, and they hold a lot of resentment towards Islam due to past family stuff. If they found out, I feel like they’d totally disown me. I can’t wear a hijab at home or when they're around, plus my brother goes to the same school, so I’m kinda scared he might find out and spill the beans. I feel guilty about hiding my faith and worried I might mess things up. Any tips on dealing with this guilt and staying patient would really mean a lot. I’m also having a tough time with prayer. I try to pray regularly, but I’m not really sure if I’m doing it right. Different sources say different stuff, and it confuses me - like, should I recite the surahs in Arabic or is English okay, and the exact steps feel kinda unclear without someone to show me. Some practical, straightforward advice on how to pray correctly would really help. One more big question as a new Muslim: how does marriage work if my dad isn’t Muslim and can’t be my wali (guardian)? I don’t know what the options are or how to set up a proper nikah in that situation. JazakAllah khair for any tips, personal experiences, or gentle guidance. I really appreciate support from others who’ve gone through similar stuff.