2D C array to Numpy Array using ctypes

Hello I am trying to write a simple C function that takes two inputs (m,n) and creates a 2D - array of pointers. Now I want to call that function in Ctypes and create a numpy array from the pointers. I am however not sure how to proceed - and run into an error when calling the np.frombuffer - function. Any help is apprechiated

c- file

#include <stdio.h>
#include <stdlib.h>

#define RANDOM_RANGE 50

typedef struct {
    float val;
} cell;

cell **matrixMake(int m, int n){

    // the rows
    cell **pRow = (cell **)malloc(m* sizeof(cell *));
    // the cols
    for (int i = 0; i < m; i++){
        pRow[i] = (cell *)malloc(n * sizeof(cell));
    }

    for (int i = 0; i < m; i++){
        for (int j = 0; j < n; j++){
            pRow[i][j].val = (float) (rand() % RANDOM_RANGE);
        }
    }

    return pRow;
}

Corresponding Python File

import numpy as np
from numpy.ctypeslib import ndpointer
from ctypes import *



class CELL(Structure):
    _fields_ = [ ('val', c_float) ]

libc = CDLL("c_arr_multi.so")

libc.matrixMake.argtypes = [ c_int, c_int ]
libc.matrixMake.restype = POINTER(POINTER(CELL))
res = libc.matrixMake(6, 3)

x = np.frombuffer((c_float * 6 * 3).from_address(libc.matrixMake(6, 3)), np.float32).copy()

print(x)

I am simply not shure how to proceed