Help with moving a website on old droplet with PHP 7.0 and Ubuntu 16.04 to a new one

I have an old droplet that I neglected to update, but want to move the Wordpress website on it to a new droplet where everything is up to date. What’s the process? If I make a snapshot of the site, will it just include the old PHP/apache files and old Ubuntu or is that not part of the process? I made a backup of the site using Updraft that included the database, plugin files, etc. but Im unsure of how to even get to the point of using it for a new droplet.

1. Is it as easy as setting up a new droplet with a snapshot and then switching the domain name for the nameservers to the new IP?
2. Will http still work? I set up some reoccuring http over 5 years ago through Let’s Encrypt and it’s worked since.
3. Do you still have to do the LAMP stack process on new droplet?

If anyone could provide a list of steps it would be helpful. Thanks.