Joe,
Delayed reply but might be worth while if you had a go at say an etched wagon or two to practise on ?.When i started building in 7mm back in the early nineties the first things i had a go at building were some ABS whitemetal wagon kits and got used to soldering and putting them together then painting them then I went on and bought a s/hand etched brass CCT kit and sort of went from there. A bit later I was given an incomplete RJH 10000/1 kit and spent some time making that up with their famous instructions!
Regards
Al