Start by learning the basics like you said you have (with Genki 1), try other resources too and see how you find those (Curedolly / Japanese ammo with Misa / Tae Kim / Bunpro).
Then find something that’s not too difficult that you’re interested in reading and try and struggle through it. (if you’re not interested it’ll be harder to motivate yourself to do it).
I wouldn’t usually bring up other users like this but I think @mariodesu is a good example, they’ve been reading attack on titan, and I believe everytime they are stuck or unsure about it they post in their thread (you could use a the grammar thread), seems like they’re learning a lot by struggling through and just keeping on regardless, and in the future these hard lessons will make it easier to read new things since they’ll have put in the work.
Example of what I mean.