18ch is supposed to be one the the better introductions to the genre, but you’ll still need to do some learning before you start.
I don’t know if this is the best video, but it should do the job https://youtu.be/cLkIqruI6Lw and of course you’ll need the manual for reference too https://docs.google.com/viewer?a=v&pid=sites&srcid=YWxsLWFib2FyZGdhbWVzLmNvbXxhYWdsbGN8Z3g6MjRmZDg5ZjliYzdlZGE1ZQ
18xx.games enforces the rules and allows you to undo liberally. There’s no hidden information so you should be able to undo at any time. You’ll have to be comfortable not fully predicting the consequences of your actions the first few times you play, but that’s an expected part of the learning curve.
I would suggest if you see the game as laying track, building stations and running trains to make money and increase the value of your stock portfolio (that’s your victory points) then the game should be pretty straightforward. There’s lots more depth to the games, but playing around and trying to run a good company is a solid, accessible, place to start.