Personally I'd get into the repetitive practice before throwing money at it, but I'm a tight northerner .
My recollection of learning the basic technique (in the 80's!) pre YouTube, was that after hours, possibly days of thumping away it suddenly seemed to click and feel right. Same with ghost notes and muting, don't forget the muting!
Keep practicing and your own style/technique/hand shape will develop.
The thing I struggle with now is adjusting it to different bridge spacings, but that's probably because I won't push myself to persevere when I can easily pick up another bass that suits me more.
Enjoy the Yamaha!