Struggling to model irregular rounded shape, any recommended tips/tutorials? I've tried to search for tutorials on modelling irregular/rounded shapes but they seem to all be for symmetrical shapes.
I've been trying to recreate an object by using a subdivided plane and following the shape of the object by using sizing and movement with proportional editing. I also tried to re-create the object by using a cloth simulator, which obtained the wanted shape but I had the same problem as I am having now.
The object I am trying to re-create:

This method has been a little bit fiddly and I assume there must be a better way to achieve this, if there is any advice that can help with my modelling I would be grateful to hear it.
The problem I am having is bringing in the plane to fit nicely on top of the original object and to have the vertices lined up. When I bring in the plane it crinkles and loses the smoothness of the original object.
It may be possible to continue with this method but I feel I'm on the complete wrong track.
The problem:

Thanks
Assuming this is an exercise; that you're not wanting to retopologise the original in some radically different way..
This is a subdiv. model: the topology is a that of a Round Cube.
So, starting with 1/4 of one of those, mirrored left to right, and keeping the poly count at the minimum to capture the curvature:

.. just shovel the vertices around under proportional editing, while looking at the result under Catmull-Clark subdivision, level 2. You could use a more orthogonal reference, for accuracy.

Add a Solidify modifier for thickness, creasing the rim, and, after applying the modifiers, extrude the fillet.