For a fool proof and durable finish, I would suggest using a wiping poly. Brush marks in Poly can be brutal. You can wiping poly pre-mixed or mix your own from any oil based polyurethane by mixing it 1:1 with mineral spirits. The can might say not to thin this much but it works great.
Wash it on thickly with a foam or bristle brush, then wipe it down with a lightly saturated lint free cloth (tee shirt). Let dry at least 4, preferably 24 hours between coats. Lightly hand sand with 400 after first or second coat. 3 or 4 coats total will be plenty, more if you want a flat plastic look. 48 hours after last coat, circular motion with 0000 steel wool and very small amout of furniture paste wax, then buff after dry (10-20 minutes).
It's best to really flood the surface, then wipe it down so you get good saturation in the grain.
For a better look (IMHO), after the first or second coat, wipe it down with a dark gel stain and the Oak grain lines will hold the dark stain and really look great. Make sure to seal another coat or two over this.
Of course, try all of this first on some location where it is less visible than on the top to make sure you like the look.