Is coasting in a manual car bad?

I have a 1991 Honda accord.

My questions is, I heard someone say it's bad to coast, as it is bad for the engine and wastes gas. When i searched it, people said they were putting their car into neutral when coasting.

I don't put my car into neutral anytime except when I park, or when I'm sitting at a long red light so i dont have to hold the clutch.

If I'm going down a steep hill, or slowing down to come to a turn or red light, I hold in the clutch so it coasts smoothly, otherwise the car starts to jerk, i then adjust gears according to what speed im in as i turn. If i end up at stop light i just change back to first

is this bad or incorrect? I've found if i brake alone, my car jerks and bounces around.

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