You asked

Is the panasonic lumix gh5 good for beginners?

I think the GH5 is a good choice for a beginner, with one caveat: it has long been a favourite for video, so it suits people who want to shoot moving pictures too. Its in-body stabilisation helps with handheld shooting, and it's cheap used, which is how I'd buy it. As your first camera advice goes, don't overthink it, and check how it feels in your hands.

Micro Four Thirds also has a huge lens range to grow into. For an everyday setup, I'd start with:

If you're buying used, buying used explains what to check.

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