Hi Karen,
I am Dave, I will help you with this.
1
Sync Pending just means that file is not fully synced to your OneDrive, it may be syncing other files at the moment and will get to that file, it is in the queue to sync, you cannot jump that file up the sync list, it will sync, you just need to wait.
If you want to manually upload a file to OneDrive, you can drag it into OneDrive in a web browser.
2
Right click the OneDrive icon on your Taskbar and open OneDrive settings, do you have Files on Demand enabled?