welcome to the veg*n family
i know its hard changing your ways, especially when you have a farming family (my grandparents owned a sheep farm, my mum was raised on a sheep farm) so not eating meat is like going against their livelihood. and yes we are!
but never fear, for we are all here.... for you! we've all been there, done that, got the shirt (see the merch for sale through animals australia! that's sure to stir the family

)
as matt said there is so much fake meat in woolies/coles these days! sanitarium have sausges, ham, bacon, mince, burger patties, chicken fillets, deli luncheon rolls, umm... everything! there's even flavoured tofu which is great in salads.
as for the comments and ppl not believing that this is a life long commitment, i'd just use that as more fuel for ur fire! prove to them that u are serious and stick to it

i find it easier to ignore them to debate with them.
but stick with it, you're doing the right thing, not only for the animals, but urself too.