Hi LicenceToLearn,
I think using a VOR for a position fix is a very good idea and generally quite easy to do. If you have one of those ruler thingys inside a protractor they're really good for working out where you are if the VOR has DME as well.
I think there's been some really good advice so far. But it's important to remember that getting lost 'can' be serious and therefore if you are really struggling to know what your position is my best advice would be to switch frequency to 121.5 (London Centre) unless you are already with a radar controller and either ask for a training fix or make a pan call and say that you are lost. They will be able to give you a fix immediately and help you get back on track and away from danger or controlled airspace. They're there to help you so don't feel embarrassed about ever using them.
Hope that helps.