You asked

Is the panasonic lumix s5 good for beginners?

Yes, I think the Panasonic Lumix S5 is a good first camera, especially bought used, since it's cheap on the secondhand market. You get a full-frame sensor and in-body stabilisation, which helps when you're still learning to hold steady. Its autofocus is contrast-detect, so it can be slower with moving subjects. If that bothers you, the Panasonic Lumix S5 II adds phase-detection autofocus.

For a sensible starter setup, I'd look at:

Don't agonise over the choice. Read don't overthink it before you buy.

Written by Claude from this site's pages.

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