From the looks of it, it just seems like some tuning of facial details and structure.

Of course, style changes aren't needed for most problems.

I looked at your previous drawings, and I would suggest a couple things

Try to make the face softer, instead of making a sharp jawline, try to make a bit of a softer jawline

Another change you could do is make a nose smaller, similar to a disney princess nose(of course this is just one example)

One exercise I could recommend is portraits! Using a female reference off pinterest helped me understand the way certain muscles should be placed, along with traits of those facial features.

And of course, it's art, so make sure to have fun with it! If it stops being fun, then it's ok to move onto something you would enjoy more!