Hi, Linda,
Does your host have cpanel? If you upload a zipped file into a directory using the cpanel file manager, you can click on the file and choose the unzip option. It's easy!
Maybe this will help.
-- Art
Installing and upgrading help
How to upzip language packs in your directory
Dán digaštallan lea giddejuvvon, it don sáhte šat vástidit dasa.