Switch to an LTE or wired connection and try again. Try using a VPN (you can find free trials online) to connect to another datacenter or prevent your ISP from seeing what kind of traffic is coming and going on your line.
You may be in a remote location or your bandwidth may be throttled. NOTE: If the download does not progress, see Basic troubleshooting: How to troubleshoot packages installation & decompressing issuesinstead. The troubleshooting steps below will help you improve your download speed. There are many reasons your download speed might appear slow.