I know his hearts in the right place but another thing with growing with your stutter is not caring what people think. The hardest part is your father. Mine I know he loves me but for 33 years if I stutter it’s like I can see in his eyes he hates it. He’s so concerned with status, having a stuttering son doesn’t line up with success in his eyes. Mostly he’s sacred what others will think. He told me about a guy who stuttered and when (this guy stuttered) he just stopped talking until he could say the word. He said he liked how he “owned it” this pissed me off and still does because every time I open my mouth I own my stutter. This is an advanced course on not giving af what others think. Does he have any issues? Possibly say would you want me to bring up blank unprovoked and give you unsolicited advice on it? Either way sounds like you’re on the right track. It may even come down to telling your dad you don’t care what he thinks directly. Like thanks for the support but I’m not asking for your advice on this.