Sounds like what’s stopping you the most is the lack of grammar knowledge. I’m going to do a Radical Thing and suggest laying off WK (you have lifetime!), and just power through Genki 1 and 2 before coming back. Don’t try to bite off more than you can chew.
(Another method that would be less painful but more expensive would be getting a tutor on a site like iTalki and working through the exercises with a tutor.)
ETA: there’s a new Genki study group forming on the forums, you might find it more palatable than studying it on your own: