Sailing?

Hey so one of my ocs is about 3 thousand years old and before he died he wanted to be a sailor (but he couldn't cuz he died at around 15-16ish and hasn't even been in a boat but read a lot about them)

i was wondering if anyone knew what sailing boats were like back then?

I wanted to know so I could portray them right?

And also I more modern boats too as the story mostly takes place in our time.

I'm not sure about boats, but here's a good place to start.

Thank you so much, google wasn't much help so this is great!