Welcome aboard.
I dabble in US 'N' scale. I have found that Kato locomotives are excellent. I have a few by other manufacturers which are good but not, to my mind, as good as Kato. If you make your first locomotive purchase a Kato one, I don't think you will be disappointed.
There is a following for switching-type layouts here and in the US. If you have not yet heard the term, 'Shelf Layout', these can sometimes be similar to what you probably have in mind.
WH Smith stocks Model Railroader (MR) which is a good read. It used to be really substantial but it has lost a lot of advertising over the years. MR also produces annual publications. Model Railroad Planning might be of interest to you.
I very much look forward to seeing how your project develops.
Best wishes.
John