How to clone Github repository to local device with Github Desktop

I have a project my friend and I are working on. He made some changes and added them to the project on github. I hit clone on the project in github and then it opened up the github desktop and now I have 1 arrow pointing up and 16 pointing down.

I believe this means I have a non-committed change and 16 changes ready to be pulled, but no idea how to find this change, or if I commit the change will it take away all the changes already on github that are not on local yet?

Just don't want everything to just be deleted. Thanks.

Solution

I have a non-committed change and 16 changes ready to be pulled, but no idea how to find this change,

Committed change actually: you have one local commit.

You can:

do a backup of your local repository
make sure you have autostash and rebase in place
then pull through the GitHub Desktop interface.

That is (Git 2.9+):

git config --global pull.rebase true
git config --global rebase.autoStash true