Is it hard to make stained glass?
The answer is sometimes depending omn the glass you work with. Youghiogheny is beautiful glass that is shale like- layers and a little brittle ans can spinter when you break it.
Really doing stained glass is not that hard. When you start out, picke easier patterns and non expensive glass, this will make it easier on yourself. Ask questions, it is better to ask them than not to ask!
When I teach stained glass classes, I do not hover over them but give guidance when needed. The best way to learn is by doing and making some mistakes so you do not do that again.