It sounds like you are trying to speak using your falsetto voice. This is what you hear a lot of men doing when they are trying to imitate a female voice for comedic effect, or something like that, but it's not the right way to train your voice if you want it to sound like a natal female's. A falsetto voice will always have a sort of horse wispy quality to it, and will never be able to sound like a normal speaking voice. In order to have a voice that sounds the way a natal female's does, you need to spend some time training your normal speaking voice to increase it's range. There are lots of guides and videos on how to do this, and there is even a whole
section of the forums devoted to it. But it is a lot to process, and it can difficult to know where to start. My best advice would be to just start working with your normal male speaking voice, raise the pitch ever so slightly, and work on maintaining that as your regular speaking voice. Also try working on your intonation, because having a more feminine intonation to your voice is just as important as pitch is. Just remember, the key is to make subtle changes a little bit at a time. Don't try to run before you know how to walk.
