I am 37 and started again skateboarding one month ago, after a 20+ years break.
Go for it, you won't be disappointed !
Even without doing any trick, I was immediately so happy to just ride and cruise in the park/bowl.
One advice for the setup : personally I was not sure about my motivation so I bought a cheap complete at ~ $100, but after few weeks I felt limited by the poor bearings, and wheels that are way to soft and small for the big bowl I am skating. So I am buying better parts now.
If you were a decent skater, probably it is good to take right away a good setup. Maybe you should go to a skateshop and explain what kind of skateboarding you would like to do, they will have good advices regarding deck width, truck width+height, rising pads (or not), wheels compound and diameter, bearings ....