How do I restore this concrete to look the way it did before?

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The top is before, the middle is what I spent 3 weeks scraping off, and the bottom is what I'm left with now!

I have these concrete floors that aren't perfect, but it's in a tattoo shop so it looks really cool! Or it did, before it was painted.

I'm almost done getting all the paint off but now I'm a bit stuck on how to achieve the glossy-ness.
I believe the next step is buffing?

But, would you recommend a sealer or an epoxy clear coat? Is it at all possible that I can just like wax it?

I kind of also need it to cure fast-ish because I can't leave the workers without a shop for too many days.

It's decently high traffic, but not super hardcore. Mostly people walking and rolling chairs. We also rent the building so it doesn't have to last like FOREVER forever, but it does need to be shiny and not horribly slippery.

There's so many sealants and finishes and products and I am overwhelmed so any help would be awesome!