There are a couple of writers who think Ubuntu is not consumer ready yet. But I think you should give it a try yourself first and draw your own conclusions.
Option 1: Use the Live trial
You can download an Ubuntu ISO which you can burn to CD. This installation CD can be used to try out Ubuntu without even having to install anything on your computer. Just insert the Installation CD in your CD-ROM drive and restart your computer.
The computer will restart with the Ubuntu operating system, and you can click around and see how things basically work. If you like what you see, you can try the second option.
Option 2: Both XP and Ubuntu in multiboot mode
If you want to do more for testing, like really installing and configuring programs, you will need to install Ubuntu on your hard drive. If you have enough space on your hard drive, or if you have a second hard drive, you can keep your current XP installation and install Ubuntu on a different partition or drive. The Ubuntu installation is very helpful in creating the right partitions.
I strongly advise to also make a FAT32 partition, which can be made accessible for both XP and Ubuntu. This is where you can store your work, so it is available to you, no matter which operating system you are working in at that moment.
This way, while testing Ubuntu, you can always reboot your system to switch to XP to get back to the system you’re used to, in case there are activities of certain urgency. Whenever you want to continue “playing” with Ubuntu, to get the hang of it, you can reboot the system again and select the Ubuntu system from the boot menu.
Once you do get the hang of it, you can decide to go for option 3.
Option 3: Replace XP with Ubuntu
If you are certain that XP has not much more to offer than you can get on an Ubuntu system, you can decide to remove XP from your machine and install Ubuntu instead.
It is very important to make a backup of every important bit of information you have on your current XP system. Make sure you use partition or drive with the FAT32 filesystem, because Linux can not read from NTFS filesystems by default.
Research how to convert from XP programs to Ubuntu, like what to do to import your Outlook information in some open source mail client like Evolution, for instance.
After everything is backed up and you are sure that there is nothing you overlooked, you can reboot your system with the Ubuntu Installation CD in the drive. When the installation starts, you will have the chance to format the partition on which XP was installed, so you can install Ubuntu there. The installation process is fairly simple.
There is also a possibility to install XP within the Ubuntu installation, using VMware. This way you won’t need to restart your machine to use XP. But I recommend to use this only to export information so it can be used in the Ubuntu installation. Using VMware uses a lot of resources, so use the XP installation through VMware only if you need to do something that is not implemented in Ubuntu yet. I also advise to restart your computer and only use VMware, while closing other programs, to minimize the lag.
Then just enjoy the freedom of open source.
Note
This is not an installation manual or tutorial. This article just describes the possibilities available for switching from XP to Ubuntu, while getting to try Ubuntu out first.
Please read “operating system” where I wrote XP. This can be done with most of the available operating systems.