Make sure you are connected to the Internet before you begin.
This is what I do after installing Ubuntu 20.04 LTS
On the welcome screen: Sign into a Ubuntu single sign-on. Then I Sign into Google.
Next window: Setup live patch. You have to have an Ubuntu one account.
Next windows: Yes I want to send system info to Canonical to Help improve Ubuntu.
Next window: Leave location services off. Close window.
The software update should have already popped up a window. If not run software updater, and install updated software.
Open Firefox, search for Google Chrome, and download it to the download folder. Once it’s downloaded, double click it and install.
Then launch the Chrome browser, and a dialog box will appear. Uncheck “automatically send usage statistics and crash reports to Google.” Leave checked, “make Google Chrome the default browser.” Click “okay.”
Then sign in to Chrome. “Turn on sync” dialog box will appear, click “Yes, I’m in.”
On the left applications bar you will see the Chrome icon. Right click on the icon and select add to favorites. Now drag and drop that to the top, and remove from favorites Firefox (by right clicking).
Go to the software Store, and install timeshift. Timeshift is a system restore utility for Linux.
Open timeshift. Select rsync. Press next. Leave the snapshot location as is. Press next. Select weekly and keep 3. And press next. And then press finish. Now create a snapshot, by pressing create.
One other thing I do is I turn off the screen saver, and I turn off lock the computer when screensaver starts.