A good challenge! @NickM gave a few pointers in this thread that you might want to have a look at - https://www.workshop.com.au/t5/Interiors/Tips-for-large-tile-adhesive/m-p/597 - and hopefully other community members will be able to assist.
Also, have you seen this?
There's a lot of other tiling D.I.Y. videos on the Bunnings website that you might find helpful.
This is the sort of look I'm going for. Bigger space, no sink just stove top and rangehood. So a slightly different layout but it's a good inspiration. 200 x 100 tiles.