On the tour page. Two options. ( Side note, if this was a uni paper, I would have said you padded it out with really large images, can they be a little smaller? Do you need to show the whole screen? Could the images work without being in context ( ie where your numbers are )

One:

Use an index so people can jump to a specific part. Then the index can help sell or prepare them for what they are about to see.

Two: ( more work )

Use "personas".

I am a student learning french. - then give them links to show how the site will work well for them.

I am a teacher of chemistry and I really like videoing my experiments - again a few click thrus targeting this type of user.

etc...

With your personas, dont aim to fill up all features in all personas, just think what will work for them.