Haha appreciate the kind words thank you. I’m Canadian so it didn’t affect any understanding, just sounded funny. Sean Connery made the sh lisp work for him but I don’t imagine he could have with a th lisp.

English speaking actors/characters with a th lisp tend to be stereotypically nerdy/child like/adorable kid types, characters that are meant to be cute or sympathetic, but not to be taken very seriously.

As far as mirroring, I’m an artist as well so I learn visually the best. Seeing my mum make the correct sound and then how I made my incorrect sound made me understand completely.

It’s not something I often think about, but I am proud to have corrected it myself. My parents were looking into speech therapists after I brought it up but I wanted to see if I could do it myself first. I still make a sharp whistle at times which I suspect stems from maybe “overcorrecting” my teeth/tongue placement early on.