If your food is bland: season it. That's it, that's the solution.

Most recipes either write "season to taste" or leave even that out completely, because it's just such an automatic part for every experienced cook.

I don't know if there's a good guide to seasoning out there, probably.

But apart from that, it's not too hard to build your own knowledge. Just go to the grocery store spice section, and buy a bunch of the generic grocery store brand spices (those will be the spices most used in your region) and just start putting them on your food.

My personal suggestion:

Salt, salt, saaaaalt (/Soy sauce). Put some salt in the water that you cook your noodles with. Put some salt in your sauce. Put some salt over the final mix. Do all this slowly, only a bit of salt at a time, and mix and taste each time. Repeat until it tastes good. It's almost always salt missing if it's too bland. It matters, too, at which point you add the salt, if you put salt into the noodle water, the noodles will already absorb some of it. That's different than putting it on top of the noodles later.

Pepper(/chili). Almost all dishes want some of this, even if you don't like spicy food. Even if you only put a bit on it where the result doesn't register as "spicy", it still makes a lot of difference.

With all the other spices you'll just have to experiment with, see what you like.