It is not the "Porcelain" that is the problem, it is the sheer size of the tile that Penno being cautious about. Smaller porcelain tiles are generally no more difficult than normal ceramics, bit harder to cut and a bit heavier, but the principles are the same, as long as you use adhesives and grouts suitable for porcelain.
To try to fix 1m2 tiles is a task indeed, to add porcelain into the mix makes the task that much more difficult. Each tile must weigh something like 25 to 30kg and when you come to cutting them what are you going to cut them on? They may well be curved as well because of the size!
I have been tiling about 9 months and I don't think I would take on a job such as that yet. I don't have the machinery to do it and I would be looking to enrol a"helper" if it was me.
If you take on the job, good luck, let us know how you get on.
Grumpy