Spuds are hardy plants. They are very forgiving. You'll be fine gringo, just pay attention to the leaves once the plant sprouts, you will learn to interpret what the plant is telling you it needs.
We had more than average rain last summer, I ended up putting the hose on the potatoes about 4 or 5 times total during one particularly hot spell that lasted about 2 weeks. The rest of the time the rain did the trick. YMMV. So will mine next time.
Just be sure to keep hilling up as it grows, otherwise you will end up with a harvest of green potatoes. Once that happens they are only good for another round of seed potatoes, unless you want to get solanine poisoning.