It’s definitely tough starting over and you are right, the timeline is different for everybody. My relationship lasted more than 10 years and ended in a very painful divorce. I think the other posters have a point... the nature of your past relationship, reasons for and ways that it ended will probably be pretty big factors.
The advice that my therapist gave me was to work on myself first and then dating will sort of work itself out. I took his advice, went to therapy on a regular basis and tried to really figure out what I wanted in another person and in a relationship. Then, he gave me some of the best advice I think I’ve ever gotten...
I wanted to be with a person that was emotionally stable, had a good family or at least good personal relationships with other people, was open and honest and that shared most of my major life goals... so he told me I should work towards being those things myself... to try to have the same qualities as the person that I wanted to date. It really helped me be a better person and a better potential SO.
I worked hard on re-establishing my own social circle, reconnected with family that I had lost touch with, worked on a lot of my insecurities and bad habits (like not being honest about how I feel)...
I ended up meeting a great woman, as a result of my new-found social circle, about 5-6 months after I left my ubpdxw. It felt fast to me at first, but the relationship has been so good, it was a really easy choice to make to stick with it. We’ve been together for over a year now... virtually no drama (which is soo awesome). The relationship is easy... I didn’t realize that was possible

In general, I worked on myself, then put myself out there in a healthy, honest way and it went pretty well... give yourself the time and consideration to be happy with yourself. You deserve that!