It has a timeline, and not necessarily a smooth one. What does not vary in the process of coming out is the fact that it is a process.
The process of coming to terms with one's sexuality varies widely, depending on the individual - it can be scary, invigorating, heartbreaking, life-affirming usually it's some complex combination of those feelings and more. Billy (Alex Lawther) and Blah Blah Blah (AnnaSophia Robb) in 2018's Freak Show.