My brain is always pretty bored and jumps from language to language, so I learn a bit of Language A, then Language B, then switch back and forth. French has shorter chapters on the app I learn it with, Busuu, and I already know a good amount of Spanish (which I study in school) and Portuguese. However, while Italian might cause me to mix up Spanish, Portuguese, and Italian, it’s easier to pronounce. It also, however, has longer lessons on Busuu.
French is spoken in many countries, though, and I’m also LGBTQ if that makes any difference, since some people study languages from countries that don’t support/respect the group they’re part of.
Italian is essentially a cross between Spanish and French. If you know both, you’re basically 80% of the way to knowing Italian.
Given how much more practical French is, I’d say learn it first, then learn Italian later.