The information you gave your friend will be very good for him, he will surely make good use of it. And yes I have shared my knowledge about painting, crafts and also about the learning I have done and I love it and it has been well received. I like to give information that at the time was useful to me and if it helps someone else, I welcome it.
A particular case, my mother's cousin was painting a portrait of her father and she called me because the face did not look the same as the photo, I gave her some advice, I painted a little and she did the rest, it looked great!
Painting advice, I assumed if you answered it'd be something like that.
It's my biggest hobby! It couldn't be any other way hahahah!