That intial completed section should have a "Continue" icon at the bottom that you click to get to the next part of your hub creation. I assume you have done this and are getting stuck at this point. If you have not seen this little button, then be sure to scroll down until you can access it.
If you are still stuck, try refreshing the HubPages page. I do this often whenever a template seems stuck. Then, if that doesn't work, I close all my internet tabs and turn off my computer to reboot it. Sometimes you need to delete cookie history under Control Panel and Internet Options for your system to work better. Mine even has a little check box that allows you to "delete cookies on exit."
You probably have an automatic defragging system set up on your computer, too. But, if not, it helps to defrag periodically. Just click your Windows startup and enter "disk defragmenter" in the search query. You can follow prompts from there.
It is very helpful to compile your research and text in a Word document first. You can cut and paste into your hub text edit template from your stored document. That way, if the hubpage process fails for some reason, you still have your work in the Word document.
I hope I've helped you solve your problem. --Blessings!