I have a doubt, Can i be miko with a male char ?
You must complete the quest as a female character. After you are a Miko you can gender change to become a Kannushi (male version of Miko).
i started the quest as a male, if i change will i lose all the progress ?
No. You can get the spirits as a male. I’m just not sure when you need to change, but probably when you are meeting the Miko Master after you found all the spirits.