Half the "fun" of model railroading is learning a new skill.
My younger brother offered to teach me welding, so I could help him on "his" art projects.
I passed because I don't see welding a skill I need to know yet for model railroading.
I learned electronics to wire and control model trains, that lead to running a computer store & repair shop for 20 years.
I build train layouts, first and later remodeled rental homes and apartments for my slumlord business.
I have painted model trains, scenery, and countless rooms and buildings, both models and full size.
I have repaired & installed roofing, house wiring, pluming pipes, floors and sheet-rock.
I done minor car repairs and saved hundreds in shop fees.
Four years of college & university taught me how to learn a new skill without formal training.
Google & youtube have been a great help.
