You shoud first understand why there are not some drivers included by default in certain distros or why there is no such a good support for certain hardware.I suggest that you read this
Before you go with installing drivers on your own,you should first learn some basic things about Linux,you can start here
You should know that Ubuntu has root account disabled by default,that's why you have to use sudo
sometimes to achive something.This is when you need to understand what is Bash
.There are so many commands which you can use in it,here's
one of the lists.
command will give you good info about your hardware.
is a manual page for that command.There are lots of manual pages for lots of different commands.man man
will get you started.
This is all if you want to know your system.Maybe you have choosen a wrong distro to start with.There is a Distrowatch
to help you choose.Linux Mint
is configured with lots of drivers and other things by default and it's Ubuntu based.I suggest that you give it a try and then start to learn more about Linux.