I had been planning on teaching him to sleep without me at bedtime after his 6-8 week growth spurt
I personally don't think it is too early however (and a big however) it is vital to keep expectations low and to see it as a gradual teaching/learning/reassuring process that takes time - days, weeks, months - not hours.
My DS was independently falling to sleep (put down tried and awake or drowsy and awake, fell asleep alone without any crying) younger than 10 weeks old and for the majority of naps and nights several weeks earlier than that. At 10 weeks he was so independent he refused to sleep in the living room travel cot and wanted to be left in his night bed to go to sleep. I heard about BW when he was 4.5 wks old and started EASY and a gradual teaching of independent sleep then.
That isn't to say it is always smooth sailing from there on in, routine changes, developmental leaps so on so on, there are always tricky times coming and going.
I think if you are comfortable to begin the gradual process then go for it, always taking care of yourself and not putting yourself under pressure to 'achieve' though.
wish you well whenever you begin.