Giving blowjobs

So my husband told me that he don't feel nothing when I go down on him and that I'm not doing it right. I was hurt but then I asked him what am I doing wrong and what can I do to please him. He thinks that me watching porn would help me. So I tried it and read a few books but he still does not like what I'm doing. He said that this is why he never askes me to go down on him. But he also says that blow jobs aren't a big deal to him which is why he never brought the issue up to me early. I want to be able to please my man in all areas including oral. What do I do...any advice as to have to give better blow jobs or tips???🤷