I'm a cooking beginner and I'd like to make a sauce for pasta that uses tomatoes and coconut milk. How should I go about doing that? Also, what other ingredients and spices could go well with a sauce like that?
Tomato and coconut milk make a delicious combination for a pasta sauce! Here is a simple recipe you can try:

Ingredients:

    2 tablespoons olive oil
    1 small onion, chopped
    3 garlic cloves, minced
    1 can (14 ounces) diced tomatoes
    1 can (14 ounces) coconut milk
    Salt and pepper to taste
    Fresh basil or parsley, chopped

Instructions:

    Heat the olive oil in a large skillet over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.

    Add the minced garlic to the skillet and sauté for another minute, until fragrant.

    Add the diced tomatoes to the skillet and stir to combine with the onion and garlic. Cook for about 5 minutes, stirring occasionally.

    Pour in the can of coconut milk and stir to combine with the tomato mixture. Bring the sauce to a simmer and let it cook for about 10 minutes, until it has thickened slightly.

    Season with salt and pepper to taste, and stir in some chopped fresh basil or parsley.

    Serve over your favorite pasta, garnished with some additional fresh herbs if desired.

For additional flavor, you can also add some spices to the sauce. Here are some suggestions:

    Red pepper flakes: For some heat, add a pinch or two of red pepper flakes to the sauce.

    Italian seasoning: A blend of dried herbs like oregano, basil, and thyme would work well with this sauce.

    Curry powder: For an Indian-inspired twist, add a teaspoon of curry powder to the sauce.

    Ginger: A small piece of grated ginger can add a nice spicy kick to the sauce.

Feel free to experiment and adjust the recipe to your liking!
Nice, that inspires me.
I'm happy that it does! 

You can always ask me if you need more information on how to cook.
Do you have any other cooking ideas I should try as a beginner to improve my cooking skills?