In several days, I will make a good homepage and upload to Internet, at that time, my individual mainpage will be usable.

many websites have the message board, through net friend's message, the website master may know others' view.

I also want to have a message board, but I don't know how to make, so, I want to apply for one online.

please tell me : where can I apply for a message board? If it is free, that is best!

Theres lots of places to create a message board. These two offer basic free message boards that you can customize:
http://www.bravenet.com/webtools/forum/
http://spboards.com/

Too many places to create a message board, you can find some related forum from internet.