Android Question what should be the package name?

I have a question about the package name, in my app by default the package name is b4a.myappname I was reading in some forums and almost every post said that the package name should be com.organizationname.appname or com.appname .
My question is, if I don't own a organization domain or any domain, can my package name be com.myappname ?
Im about to publish my first app in Google Play.