A new valve cover gasket should stop the leak.

It costs only a couple of dollars.

The bulk of the work involves removing and refitting the stuff (air filter housing, transmission dipstick bracket, etc) that is in the way before you can open up the valve cover.

Removal of the old gasket, cleaning out the old bits/pieces and fitting the new one should take about 10 minutes.

My 2 cents...

Good luck.