i dont think freeweb allows ftp. and you should know some stuff like html before you try and conquer a website.
You can't use your own template on freewebs, but at the start you have the option to create your own website, or upload a website (beginner's or advanced I think) that's the closest I can think of
If you wanna use a template such as one on zymic.com, just make a folder called images and upload all images there. Then take the index and go to view>source. Now copy and paste all that into index.htm in freewebs.com. You need to kno html to customize it though.