There are many places online where you can find information about MicroStrategy, ask questions, and network with fellow users.

The MicroStrategy official website http://www.microstrategy.com/ is the first and most important place where you can find official information, marketing materials, and institutional videos.

Another tool that I strongly recommend is the free learning management system available at https://resource.microstrategy.com/education/CourseCatalog.aspx. You will need a MicroStrategy account (also free) to get in; click on Online Courses and follow several very interesting slideshows about different product aspects.

Next, for sure, are the extensive knowledge base and discussion groups where you will almost certainly find a solution to your problem, or a shoulder to cry on, and a helping alternative from another developer:

There is a growing community of BI users on LinkedIn; just browse the groups and join some of them:

In Google Groups, you can join: