I'm confused!

This is me trying to make sense of the plans that have arrived from the architect for phase 2 of the renovations. The garage is huge and so the back end of it is being converted into a wet room with walk in shower, sauna etc and will be accessible from our bedroom. Included in the plan is a new accessible entrance for the back of the house and some adaptations to the garden etc.
I look deep in thought but actually I am so visually spatially challenged, I have no idea what on earth I'm looking at!! I couldn't even work out how to hold the sheets to get them up the right way. Thank goodness my OH can do this stuff as second nature. This plan could be for a cage and I'd have no idea.
I guess that's what is meant by blind faith in this circumstance.