As a guy, if framed correctly I would welcome suggestions on how better to please my partner.

His inexperience could be viewed as a good thing, sort of like a blank canvas. But with that said his concern about things being "too squishy" does seem very odd, like he has some personal hangups.

But if you are not into him on other levels then you probably shouldn't invest too much time with this, just gently move on. But if you do like him, you have to make the decision on if you are willing to take the time to work though things with him and see if he can get better with a bit of practice. You mentioned that he has never preformed oral sex on a woman, did he ever explain why?