Peter Parker should get some type of job in fashion. He designed and created his own stylish superhero costume by himself, so clearly he knows about fashion.
Working at a fashion company is also a good job that pays the bills, and he doesn’t have to worry about money while being Spider-Man.
It’s also not that time-consuming.
Depending on the universe, he may have designed his own web shooters and webs that are incredibly strong and also dissolve on their own in a matter of hours. He should become a materials engineer.
There are universes where he’s more of a scientist.
He actually did that. Part of the reason Miles Morales was created is that Peter had started a business and actually started making money, which made him less of an everyman.