add white background

[milko259349307s4y]

good morning, I want to add a white background to my image which needs to be partially overlapped with other graphics.
I tried with the Live Paint Bucket tool but it turns out to be cumbersome due to the fact that the paths are often open and intertwined...
Sometimes I use the Blob Brush tool but I'm a bit imprecise (overflows).
how do you do it?

pen tool ?

please see image:

[Ton Frederiks]

You actually mentioned techniques to create a filled path, closing paths, pen tool, pathfinder.

Making a copy of the main lines/shapes you need and finetuning the m on a layer below your drawing would be a good way.

[milko259349307s4y]

yes, normally i made the white fill on a layer below my drawing