I like to make US steam era routes , both freelance and prototypical, freelance are much easier, because you can let your imagination run free, but I prefer prototypes and even if I make imaginary routes I try to base them on real practice. My advice is start with something really small scale and to chose an era which has plenty of authentic available assets of the time as the biggest obstacles I have encountered has been a lack of assets for anything in the USA before the 1950s.
I have some doubts as to people who want to create pre 1950s routes from the states will ever be well served in trainz , its nice to see a few youngsters like Trainboi who are still building steam from that era , but its the lack of small things that frustrates me ( like finding a NG handcart or a set of tools that would have been used by trackworkers ) and I have the feeling thats also what puts a lot of people off from modeling those earlier stream eras.
If you are considering being a route builder it also helps if you have skills in 3d ( and the time to make the assets ) as this will be invaluable . but most of all you need patience. On a big route I just jump to somewhere else which has different challenges when some things get too much to do anymore and then go back after a while when I'm burnt out doing the same thing .
I'm hoping that 2019 will make applying vegetation simpler and easier , because this is probably the procedure that is the most daunting to do in Trainz, (I am sure we have lost many promising routes because this aspect of Trainz is so time consuming and difficult to do well, both in making textures and adding vegetation ) but if 2019 does improve things we still need more up to date trees, shrubs and plants. The semi arid utah colorado route I am making has a number of trees that are from the area but almost none of them are speed trees optimized for TANE or 2019and it worries me that we have lost a number of our best tree makers over the past year or so , who will step up to the plate to fill the gap ?
I would be prepared to commission anyone who would make a new set of rocky mountain trees and plants that could be used in TANE or 2019. if anyone else is in the same boat let me know and lets see if we can join forces and benefit everyone in the hobby.