Tiling query

[SB2024]

I am intending to tile my hallway myself (bad idea probably) using 600mmx600mm grey gloss marble design tiles. I have checked the floor and it is level so one problem down.
My query is... my hallway turns 90degrees to the left... generally tiling advises to start in the centre of the room by measuring the length and width and marking the centre point, but with the room turning 90 degrees, do I measure the two longest sections and start there or do I start where the room turns 90 degrees to ensure everything will flow?

Attached the layout, circled in red area of work. Any advice would be appreciated

I think I’d lay some tiles down and just see how they will fit. From there you probably will be able to see where you should start. For instance you want to be cutting tiles at outer edges in equal amounts if possible. I think I’d also be marking up with pencil or sharpie pen where tiles are to go.
also are you planning on tiling the cloakroom? It would look very nice if you could continue it into the cloakroom.
Very brave to be doing it your self. Let us have pictures of it when done.

I tiled the downstairs bathroom myself which I think has possibly given me a false sense of confidence! I think i have enough tile to follow into the bathroom downstairs but i would struggle to tile around the toilet.

If I manage to do it myself I will certainly upload photos :)