To start the install process you should first add the PPA to Ubuntu.
Open Terminal from the menu or by pushing CLT+ALT+T at the same time.
In terminal type the following commands:
sudo add-apt-repository ppa:yann1ck/onedrive
After pushing enter run the following command:
sudo apt-get update
Once update completes you can install OneDrive by typeing:
sudo apt install onedrive
Once installed now you can go to the configurations page on how to setup the client.