If I want to cook delicious foods, what should I do? Can you recommend me?

I would buy a couple of good cook books and study them and then try some of the recipes. Trial and error till you find things that you can cook well.

The Ten Cookbooks Every Cook Should Own | Epicurious.com

Five Best Beginner Cookbooks - Lifehacker

There are lots of sites online that have great recipes and some even have videos to how you how it is done. I used superfoods.com, allrecipes.com and foodnetwork.com.

There are thousands of different websites for a variety of dishes. I recommend the ones gator blu linked.