Mongo db indices on embedded documents

I have a domain object model as shown below ...

@document
Profile
{
     **social profile list:**
      SocialProfile
      {     
          **Interest list:**
          {
           Interest
            {
                 id
                 type
                 value
            }
            ...
       }
       ...
}

Each profile can have many social profiles, in each social profile there are many interests associated with the profile, through a specific social profile (a social profile is a social network, such as Facebook), each interest is an embedded document with fields id, type, value.

I have two questions. Can I index several fields separately in the document of interest? can i create a composite index in an embedded document?

I assume that the complexity in my model is the deep level of the embedded document, which is 2 .. and that the path to this document is through arrays ...

spring ? , , , mongo