Textures Question

[Belle]

Hey Guys,
I'm starting with a square, giving it a flat fill. I'd like to add some texture to the square, but the only way I've discovered is to open the folder of textures in the fill gallery and select it as a transparency.
The only problem with that is that it's so transparent it lightens the color too much. If I reduce the transparency, the texture goes away.
I'm sure I'm missing something.

If you had a plain square, how would you add texture to make it look like, say linen or a plaster wall, or just plain bumpy without losing the color?

Thanks so much for any insight you can give. I've been able to add texture by using plug ins but would like to use these texture tiles that I have if I can figure out how to do it, as I have many that I like more than the few in my plug ins

I did search the posts but didn't see anything specific enough to what I'd like to do.
Am attaching file....

Thanks so much,
Belle