Quote - i want to learn to make millions of heads morphs and body , muscle morphs ( such as M4 Morphs ++ ) for my custom character. where can i find tutorials of it ?

There is a lot of stuff implicit in that question. Making a good morph is a combination of many skills. I think you should try to break your question down into smaller parts, in order that you may receive more detailed answers.

First off it helps a lot to know what shapes you should be trying to create. In other words it helps a lot to have some understanding of human anatomy. Perhaps a life drawing class would help with that. I must point out that I don't know anything about anatomy myself, so this advice is very much "do as I say, not as I do".

Next comes the practicalities of shaping a mesh. You can do a lot in Poser with magnets and the morphing tool, but for real serious morphing ("millions of heads" LOL), you will need to learn and master some modelling application.

Finally there is the Poser stuff. Getting your morphs into the figure, eg 'delta injection. Controlling the morphs, eg ERC, FBMs, and JCMs. Packaging the morphs for distribution.