We understand that. We are not expecting that you begin to immediately change your whole way of life. These are things that can be incorporated as you go.
I also understand that it feels like criticism. As hearing parents, we enter into a totally unfamilar world when told we have a deaf child. We are unsure of what to do or how to do it. We want to do everything possible for our child, but are always afraid that we will not be doing something right. That tendency to take things as criticism when they are not is very natural in the beginning.
Let us here at AD serve as your deaf community. I was lucky in that I had access to a fairly large deaf community about 20 miles from where we lived when my son was Will's age. I heard the same things from them that we are saying here on AD. And to be honest, I felt criticised in the beginning, too. Then I realized that they were only trying to do for me what I had asked them to: teach me what it means to be a deaf child. It was just my own insecurity about being able to raise a deaf child that made me take things too personally sometimes.
One of the things I did when I was learning ASL was to purchase The ASL Phrase Book by Lou Fant. Rather than having just single word translations of signs, like most of the dictionaries, it has commonly used phrases. It really helps to get a handle on the syntax, and you are using full sentences much more quickly than trying to learn sign by sign.
Also, to help everyone in the family build up their ASL vocab, I took flash cards that had a word, and then the picture of the thing the word represents, and ran copies of the signs from an ASL dictionary. I then pasted the signs onto the flash cards, and hung them on everything in the house, lol. There was an added advantage: not only did family members increase their sign vocab, my son learned pre-reading skills from the practice. He was reading words by the time he was 3 1/2 because he learned to associate the fact that sign and printed word were just different symbols for the thing being talked about.