Question about dpo and cycle days

Chava

Ok so I hope this makes sense typing out. Ok so I typically have a long cycle about 36 days. Well I see women all the time testing at 8,9,10,11 dpo and getting their bfp. Well if I have a longer than normal cycle would this be the same for me. Or because I do have long cycles I need to wait longer to test? I'm on cd30 but shouldn't start my period for another 6 or 7 days. Hope all that makes sense.