Large Porcelain tiles small thin hall

Hi i'm starting a tiling job my first time argggg ...lol could any tilers give me some advice i've bought 600 by 600 mm large porcelain tiles for a great price,what i can't get my head around is i've read to start from the centre and tile out problem is the hall is 1.47m wide so do i lay two 600mm side by side and a smaller cut of 27mm along one side or do i lay two 600mm tiles and put two smaller cuts of 12.5 /12.6 along each side........

also what happens around door openings do i need to lay a bar or something prior to laying the tiles or do i just insert a cover after tiling......

any help would be great guys all eyes are upon me lol

 

lol aye if someone hadn't dug a godawful trench down the middle.....same all over the house....for the heating pipes i guess