Good randomness in Python code for a lottery-like game

I'm trying to build a lottery-like game in Python 3.6 where a function selects a winner from a participant list where every participant has a winning chance weighted by the value of the tickets they bought. I'm using the SystemRandom class in order to avoid software-state-dependency. Is this a good practice regarding good enough randomness? How could this code be improved? Also, does the shuffling does add anything to the randomness?

import random

# Randomly selects an element from a choice list using weighted probabilities
def randomWeightedSelection(choices, weights):

    # Build index list
    indices = list(range(len(choices)))

    # Shuffle indices
    random.shuffle(indices)

    # Shuffle weights accordingly
    shuffled_weights = [weights[i] for i in indices]

    # Create random generator
    rng = random.SystemRandom()

    # Select element
    selected_index = rng.choices(indices, weights=shuffled_weights, k=1)[0]

    return [choices[selected_index], selected_index]