"fit myself" is correct and usable in written English.
It can be used to mean that someone is doing something to make themselves physically fit, like exercising. Example: I'm going to start running every morning to fit myself.
I'm still trying to fit myself in with this team.
I fit myself in the last category, but was a bit frustrated by the original Boxster's elusive hints of greatness.
He survived because, he wrote, "I am a fluid sort of an organism, with sufficient kinship with life to fit myself in 'most anywhere".
"I had always fit myself into McBuilder's spaces," she said the other day, while Pancho Villa, her irritable, adoring 8-year-old Chihuahua, perched on her lap, splayed his paws on a white laminate tulip table and fixed a visitor with a gimlet eye.
"Just because there's a societal stereotype in a certain area or region, [should I] try to fit myself into it?
"I wanted a nose that fit myself but was also prettier and cuter.
It's powered by solar panels, which I fitted myself, and heated by a caravan gas heater.
In 1896, she spoke with resignation of their planned return to the United States: "Time was, as you know, when I should have been glad to make my home in Europe, but it was made in America, & I have fitted myself into it tant bien que mal, & taken its creases more than I realized until I left it again".
"It fits myself and now my family very well," he said.
"My entire recovery (and likely, [that of] countless other males) was about fitting myself into a recovery culture mostly designed, tailored, and intended for females," wrote survivor and activist Matt Wetsel in a February 2015 blog post.
First and foremost I've got to get myself fit and get myself in the team.
