I have some text in my krita art works-the text is quite unique and he is part of the art and the visual design- to be sure it will be shown as it is on any computer and will be printed well from any device-must I convert it to path? Is it a must-and if not what are the alternatives?( the final result is jpg Image)

I'd convert to a paint layer to make absolutely sure. And don't use jpg as a final image format. It's lossy. Use png, use tiff, but don't use jpg.

And is it enough to do only convert to paint layer? or should i do both convert to path and convert to paint layer?