Initially uploading website files

I am having trouble trying to work out where to upload my website files.
The files I have are :
Images file containing 5 images

I have logged on to my ftp (dreamhost provided) and have accessed 'my
Ive click on ‘my’ so that the box is ticked and have selected ‘upload’ under the actions tab.

This is where I struggle.
I am asked to pick a directory to upload to.
I am unsure what this should be but I initially just picked 'my
Then I try to upload my files.

This doesnt work.

Can anyone help me with a quick step by step guide to making this work.

Thanks, I am a bit of a novice at this so basic instructions would be appreciated.