Stan Lee had worked on various comics before Spider-Man. His earlier works included characters like the Fantastic Four. So, Spider-Man wasn't his first.
One way could be to keep an eye on his official website or social media for any announcements about signing events. Also, sometimes special comic stores might organize signings with him.
Stan Lee signed collectible comics can be highly valuable. His status in the comic industry and the rarity of signed items make them sought-after by collectors. The value also depends on the condition and rarity of the comic itself.
Stan Lee's last Spider-Man story was a special one-shot issue that focused on Peter Parker's internal struggles and his determination to protect the city.
Stan Lee had a major influence on Iron Man comics. He contributed to the development of the character's personality, powers, and the overall world-building. Without him, Iron Man might not be the icon we know today.
You might have a chance to get Stan Lee's comic signatures at comic conventions where he made appearances. But keep in mind, this was possible when he was alive.
One key element is the character of Peter Parker. He is an ordinary teenager who gets extraordinary powers. Another is the sense of responsibility. Peter learns that with great power comes great responsibility. Also, the villains like Green Goblin are important as they create the conflicts for Spider - Man to face.