As a total amateur, I wanted to give some hope to other total amateurs. Last summer (August) I got ambition and divided a 5-year-old Oncidium. Looking at various web photos, I think it's Gower Ramsey, but not certain. I did the "sphag & bag" thing with left-over leafless backbulbs, just out of curiosity. I forgot about them, in an East window.
This was 2 backbulbs that I left connected together. This one grew first. It took about one month to see growth. Now it's 10 months old.
I had separated these 2 into individual backbulbs. One took 4 months to show growth, the other took 6 months.
Once they were about one inch long, I changed them to a commercial orchid mix (bark+peat+perlite) and have been using the "weakly-weekly" fertilizer method using Ortho orchid food.
They may still be one or 2 years away from blooming, but each is growing nicely.
So that shows a complete novice can start orchids from backbulbs!
Now if I can get them to bloom.....