Installing Ubuntu is just as if not easier than installing Windows. Basically point and click ( partition scheme, ie dual boot, single boot, whole disk, largest empty, or advanced, etc, then basically setting time/user and letting it do it's job).
And there was a guide around here not long ago in the Articles if I remember correctly. Albeit likely outdated, but still the same basic idea ( they may have added or subtracted a step or 2 since it was written )
If you don't feel confident about doing a real install, throw it in a vm. To get acclimated first.
And for the love of god, don't use WUBI.