If you have to go back to VB3 because VB6 is too hard, you might as well give up.
Seriously, VB6 is by far the easiest language and environment to get started with.
Why do you want to learn VB?
If you are really interested in learning programming, I'd stay away from VB6 or earlier.
You might as wells start with a real object oriented language.
VB.Net, C#, Java, C++, take your pick.