similar situation.
My toddler19mth went to TST The Mind Project for assessment $1150. assessor said i can try to increase eye contact with toddler and observe 2 more months before taking any classes. btw, the each class price ranges from 800 to 1000plus depends the teacher's level. After that, I did play with my toddler on the bed more and help him look at my eyes and mouths. I say more "l love u" and make him laugh. now almost 21 months and I see improvement. toddler enjoy making sounds and imitate us to say "核核突突".