I come across concrete sealers are super uncomplicated to use. Just clean up the concrete, let it dry, then use the sealer using a mop. It won’t change the color of your concrete, but will darken it somewhat and increase some gloss. You’ll need to reapply it yearly or so https://mcgepoxycoatings.com/epoxy-vs-untreated-concrete-garage-flooring-which-one-is-best/