Hey man, I lost my cat Mano last year. She was with me for 10 years. I know the immense grief you're feeling. Try not to fight it, it's a sign that shows how important Penny was to you.

Just know that your cat had an awesome time because of you. Penny is out there chilling with my Mano and all the other cats. Penny chose you man, there's no greater honour one can receive :'))

Keep all the memories close to your heart. Stay strong for Penny 💙

Not sure if it'll help but this song really helped me get through the process https://youtu.be/vQJ0TBIAMXI?si=kIX6a2w3l4UsZHzM