I just downloaded module "my album" and i like to show on my main page in center block last 5 or 6 downloaded pictures from my album.What I need?

I'm not familiar with "MyAlbum" module in particular, but here are some suggestions:

In System Admin > Blocks look for all the blocks that belong to the MyAlbum module.

There will probably be one for recent pictures.

Turn that block on by choosing the location and making it visible and clicking "submit"

There might also be some controls built into the block for how many images to display.

You access those controls from System Admin > Blocks and the "edit" link next to that particular block.

If MyAlbum does not have a "recent images" block, you might have to use another photo gallery module.

xcGallery is very good.

andycleff is correct. There is a block for recent photos, called Recent Photos with thumbs, that allows you to select the number of recent photos to show in a block.