Darren,I was in the same boat as you in March of this year.I felt like I didn't have the confidence to do a strangers house without somebody with experience teaching me.The thing to do is just practice like crazy on friends and familys houses.When you first start using a squeegee don't worry about the fancy fanning techniques that you might see people doing.Once you've soaped the glass you need to use the edge of your squeegee to make about an inch gap at one side all the way down the glass.This gives you something to 'anchor' your squeegee to and you won't leave water lines.Then just pull your squeegee horizontally across the glass,wiping the blade after each pass with a cloth.Make sure the top edge of the squeegee slightly leads the bottom edge so that water passes to the bottom and lines wont be left at the top.Then go round the edges of the pane with a dry cloth.I use scrim personally,some prefer microfibre.If there's any specks or imperfections on the glass wipe them with a dry cloth also.Must be dry.You will need quite a few cloths so that when one beomes damp you start with a fresh one.With the smaller panes of glass that are above larger panes I just use cloth to clean them rather than squeegeeing them personally.Just practice mate,it will come to you.