Inherited some audio equipment and I don't know where to begin (Technics Sl-1210 mk2, Dali sl7 & Dali swa 12)

As the title states, I recently inherited: Turntable: Technics Sl-1210 mk2, Subwoofer: Dali swa 12, and speakers: Dali sl7.

I also got a stereo preamplifier, I didn't write down the exact name, but I'm pretty sure it's of the brand Onkyo.

They all seem in pretty decent shape, and I've been told they were pretty expensive when they were bought many years ago.

So where do I go with all this? Are there any guides for getting in to this?

Thanks in advance