I'm definitely an old fart. Believe it or not, I started when I was age 4, with a wind-up Marx set. At 5, that had turned into another Marx, but this 1 was electric. I didn't like it as much, as it had 3 rails instead of the 2 rails the real trains and that Marx wind-up had.
At 6, Santa brought me an AF dual set, with an Atlantic, and a PA. I loved those trains to death!
At 8 I discovered HO with a Silver Streak SRR Auto box. I still have that car. Being in a low income family my purchases were limited to only one a month. It took me 6 months to save enough money to buy my first HO engine. Then for Christmas that year, my folks somehow put together enough money to get me a Varney set, that came with an ATSF F-3A & dummy B. One day the engines I had all stopped running on my little 4x8, so I took them apart, and taught myself how to fix them. Been fixing them ever since.
Over the years I learned alot, (and am still learning), including, how to draw layouts accurately, handlaying track and turnouts, how to paint with an airbrush,(esp locomotives),and more stuff that I have even forgotten that I learned.
So, some of you "children" may be new to the hobby, but there are a lot of us ole farts around who can give you the "wisdom of the hobby".
All you gotta do is ask! One of us OF's will be more than happy to pass on what we know.
Oh, BTW, I'm 61 and been in the hobby seriously 53 years. (Darn, I'm over 50 even in experience!)