You have two actors, and they answer different questions. Jupiter describes how you give: the style, the scale, the visibility. The 5th-house ruler describes where creative self-expression actually lives, and how well it stands on its own.
Find your 5th-house cusp, then locate its ruling planet. The ruler's sign and house show the setting you make things in — a workshop, a kitchen, a stage, a spreadsheet. Its dignity shows how much traction that setting gives you. Jupiter then colours how loudly you present the result.
The separation matters most when the two are linked. If the 5th-house ruler contacts Jupiter, self-expression and generosity run on the same circuit. A supportive contact fuses them into something one-piece and reliable. A hard contact makes approval part of the creative act, so you can no longer tell whether you are making the thing or auditioning for it.
If the ruler of the 5th sits far from Jupiter, keep the readings apart. Jupiter can be dramatic and public while the creative core stays private and self-contained. Then the audience is genuinely optional.
One limit holds throughout: houses and angles need a birth date, birth time and birth location. Without a verified birth time, treat the 5th-house cusp as an approximation and lean on sign, aspects and the Moon instead.
Put the two together and the earlier question resolves cleanly. Jupiter shows how visibly you give; the 5th-house ruler shows whether the making feeds itself. Read the pair, not the sign alone, and you can name which layer of your generosity runs on approval and which runs on its own fuel. Enter your birth details in the birth chart calculator to get the houses and angles, then follow the fuller method in The 5th House Isn't Just Romance: How Creativity, Play and Risk Actually Show Up in a Chart.