There are all sorts of opinions about a good first steamer for not many $$. Unfortunately, unless you spend the $$ you don’t get a good, solid runner.
While the Accucraft Ruby is a fine model for the price, it isn’t the best runner, nor is it easy to control. One or two of their larger “small” locos, like the plantation, might be easier to run. Personally, if you like the look of the Accucraft locos, I recommend getting a $1,000 to $1,500 loco like the small Shay, 2-6-0 or 4-4-0, (which are no longer produced but available used, like the 0-6-0 or 0-4-0 mentioned already.) You’ll find them less finicky and easier to run, though they have exactly the same features as the Ruby.
I have several Regner “Easy Line” locos and they are a delight to run, especially for a beginner, as they are geared so they can pull plenty up and down hills but won’t run away too fast. The Train Dept has the Henry and the Lumberjack kit, which gives you a chance to see how it all goes together. The MSS “Brunel” from the UK is not at all expensive and is also a geared loco so it is highly suitable as a first loco.