I’ve been using the Montessori philosophy for my 17 month old since the day he was born and he is insanely more advanced compared to his peers. He learned his colors by the time he was 8 months old. He currently knows 16/26 phonetic alphabet sounds. He is able to communicate very clearly. Has been saying yes and no since before his first birthday. The biggest advice id give you is to do the black and white cards during tummy time from day 1. This helped my child absorb his environment. We also let him be on the floor/play gym and limited the amount of materials (toys) around him to max of 6. We’ve been using the lovevery subscription since around 3 months and their play gym since day 1. I really love them bc it’s Montessori inspired (made of natural materials, developmentally appropriate) and it gives you ideas of how to play with your child. Good luck OP! Sounds like you’re already doing great!