I know what you were thinking;
"But I don't have the time or space to build a model railway"
Stop and think again, after you've watched this You Tube video of 'micro layouts' taken at various exhibitions, you will soon realise that you don't need much space to create and beautiful, interesting and fun to operate model railway.
Obviously, small also means cheaper as it can be a very expensive hobby and small also means you see results much quicker and gives teaches you new skills and techniques which will stand you in good stead for future, maybe larger layouts.
Watch and admire the love and craftsmanship in these models then #dumpthephone and have a go yourself!!