23M and my palatal sutures are open according to a ct scan (doctor confirmed)

I am considering getting an expander but I want to know is there anything I can do myself to maximize my opportunity for expansion before an expander? I cannot mew properly because my palate being small for my tongue, but I can easily force my tongue to fit if I try. I have a slight asymmetry that I don't want to make worse before expanding. Can myofunctional therapy help fix my asymmetry and maybe even expand naturally?