Hows it going OP. I may be able to help you out, I am a deadlift specialist. My best deadlift is 572lbs at 178lbs bodyweight in competition. And I attempted 590lbs at 178lbs and got the lift up, but got 2 red lights and 1 white light. With that being said here are some tips I can give.
1) Train the living sh it out of your back and hamstrings. At the start I can guarantee you that your weakness is probably going to be your hamstrings. After about 3-4 months of solid hamstring training, than your back is going to be the point that gives, when it does your going to want to do a lot of rows.
So for u I would do 4 sets of 10 reps for glute ham raises, and I would do that 3 times a week for 3-4months. After doing this your hamstrings will be insane. From there I would switch to stiff legged deadlifts twice a week. aim for 4 sets of 8 reps and always try to add weight or reps. As for your back, do variations of the deadlift, deficit deadlifts, snatch grip deadlifts, etc. Pick one variation and do it. After that do 2 exercises that really stress your back, such as dumbbell rows, seated cable rows, bent over row, etc
I would do 4 sets of 8 reps. Right now I do deficit deadlift 4 sets of 5 reps, than I will do dumbbell rows and seated cable rows.
My deadlift is elite and close to international elite according to the raw classification table. so hopefully that helps man