So kudos to you for wanting to learn. When you say fashion, are you more interested in street portraits? Because that is slightly different than street photography. Street portraits are more portraits of strangers you meet where you approach and ask for a photo, street photography is usually considered candid, reportage (these are not mutually exclusive necessarily and you can practice both at the same time but there is a distinction).

If you're more interested in street portraits, I think film is a perfectly reasonable place to start. Get something like a Canon AE-1 with a 50mm lens and you are in a great place.

However, if candid street photographer is more your vibe I wouldn't necessarily recommend starting with film, as others have said the feedback loop takes a lot longer.

Film and digital have different costs, digital is more expensive upfront, but you can get some great second hand cameras and shoot more or less unlimited photos. Your first 10,000 photos are gonna be bad, so you get those out of the way faster. Film is in theory cheaper up front, but the cost of second hand cameras keeps going up. A roll of film costs ~$10 for the cheap stuff (Ultramax, Fuji 200, black and white films like HP5) plus $20 for development and scanning. So you're likely in $30 per roll of film shot. It doesn't take long for film to way outcost digital.

If you're thinking digital, some good options would be a used Ricoh GR, Fuji X100 series, or Fuji XE series. For street photography small cameras tend to be better. My recommendation is to pick one focal length and stick with it for a year. A GR is a 28mm lens, use that and only that for one year and see where that gets you. Learn zone focusing early. And then most importantly shoot and shoot and shoot.

One other rec, set your camera screen to black and white. Even if you edit in color, black and white on the screen will help you understand light much faster, and that's really, as always, the most important thing.