I weigh in weekly just because it helps me know what I've been doing right or wrong throughout that week, and what I have to change for the following week. That being said, I was at a plateau for a few months seeing no change or up and down between a 3-5 pound range and it was extremely frustrating.
I think whatever works best for you is what you should stick with. Maybe try uping weigh ins to once every two weeks and see how that goes, but it's really what you are comfortable with. Do whatever is good for you and keeps your confidence and motivation high!
It's never too late to succeed.
| current weight: 205.0