I also know someone on this site that has an even greater knowledge than me about literally everything AT has to offer. I'd contact
@relative mAJOR
for lessons, as he can explain in great detail, unlike me. He's who I went to when I didn't know what something did.
I personally don't watch videos on sound design anymore, because I have a basic foundation to understanding what does what. But I'd go to Andrew Huang for some cool shit lol