http://www.44090digitalmodels.co.uk/tutorials/blender1.html
A set of tutorials I have always, and always will, swear by. It's built for 2.49b so there's approximately two places where you might have to figure out what's changed between 2.49b and 2.78c, but overwhelmingly it's the same program, same tools. I worked through all three tutorials in three days, and wound up with an admittedly problematic little test export. Within a month I released my first locomotive from it. And I took the harder route, because doing an engine is a lot tougher than something easy, like, I don't know, a structure or a freight car.
In any case, I certainly wouldn't try to
start with something like the 60000. If anything, break yourself in with something like a PRR A3 or the like. (Reference books like the
Model Railroader Cyclopedia can furnish the beginner with detailed diagrams, photographs, measurements and good, basic engines that are surprisingly lacking in Trainz, although they ought to be taken with a grain of salt because they sometimes fall subject to egregious errors. You can also find a good variety of simple "starter" engine drawings online, though finding information may be difficult. Just try and tackle a manageable project list, because as I quickly found, unique relics like Mason bogies or massive mainline engines are hardly ideal.
Oh, and one notable piece of information - as with any older American steam builder, Baldwin had a fairly standardized paint scheme, particularly for its demonstrators. The Franklin Institute's black and gold notwithstanding, #60000 would most likely have rolled out of the shops in 1926 in olive green and aluminum, as in photos like this:
Almost every dark face on the locomotive there would have been green, much like on the restored Baldwin #26. The closest stand-in for the tender font is Bou College, and any of your typical Roman fonts should serve somewhat neatly on the locomotive.