The thing about trying beer is that (especially if youve had mainstream mass produced meh beer) there are a lot of flavors you arent used to.
I think beers that wont bombard you with flavor may be a good start. avoid light beers.
suggestions:
sunrye summer ale
molson canadian
magic hat circus boy, widmer hefe, paulaner, franziskaner, weihenstephaner (hefes dont have loads of overpowering flavor, generally, and are good ideas)
killians irish red
red seal ale
stella/becks/heineken - none are great, but theyre drinkable and plain (imo)
orange blossom pilsner
hoegaarden
id consider most of those relatively easy to drink, if you want fruity, look for leinenkugels sunset wheat or a blue moon, if you want a little more body or something a hair darker, amber bock or newcastle brown ale are not bad starting points