SharePoint Beginner Questions

Hi Yovanka Barnard,

Welcome to the SharePoint community!

Are you running in Office 365 with SharePoint online or are you using on-premises SharePoint?

1.  You can create a template from a site if your site is not using the publishing features. So for teams sites  the option should be available. go to site settings -> Save site as site tenplate (Please also see:  https://support.microsoft.com/en-us/help/2492356/-save-site-as-template-option-isn-t-available-in-sharepoint-online-in)

2. This depends on how you created the column. If the column has been crersted on the list then go to list settings and modify the column there. If the column was created at the site  collection level then go to the root of the site collection and change it within site settings. 

3. I have no experience with Smartsheet. I had a quick look at their site and it looks a bit like MS Project. It looks like Smartsheets could simply be stored within SharePoint, but there might be bettter options avialable. It might be worth it to contact Smartsheet about this.