1. Click on menu....type in Software Manager.....click on that....give it a full minute to load
In there are approx 50,000 apps
They
all install from there...NOT from the 'net...definitely not from the microsoft store...(all apps in the microsoft store are .exe files and will NOT run on Linux
if there were any apps you had on windows that you still need....have a look at :
https://alternativeto.net/
There are thousands and thousands of apps there.....type in what you are looking for and the site will show alternatives that will run in Linux....you need to read it carefully because there are so many
Adblock plus and Privacy Badger are good.
Download them from the browser.....do you use Firefox ?....if not tell us which one, please.
You
do not need an antivirus.
Antivirus is useless
A virus or rootkit can't install itself in Linux unless you let it. In order to install itself on your computer, a virus or rootkit needs your password. And that it doesn't have.
Turn on the firewall. This is a must.
Click on ctrl + alt + T ....that will open the Terminal (or you can find it from the menu....just type in terminal and then click on it
When you have Terminal open,
copy and paste the code below in and hit enter.....then put in your password and hit enter again
Thats it.