The phrase "enthusiastic to begin" is grammatically correct and can be used in written English.
It is typically used to convey someone's eagerness or excitement to start something. Example: She was enthusiastic to begin her new job and couldn't wait to learn all about her responsibilities and contribute to the team's success.
If you have a sample that is biased toward enthusiastic respondents to begin with, and then apply a likely voter screen, it risks double-counting the enthusiasm factor, especially in cases like presidential general elections when overall turnout is quite high.
Hari Sevugan, a spokesman for the Obama campaign, drew a distinction between the money it paid to college students, who he said were enthusiastic supporters to begin with, and the payments by the Clinton campaign, which he described as an effort to buy influence among important constituencies.
But with every passing day, American credibility is called into question, particularly by other nations that were not enthusiastic about military action to begin with.
Even Charles Montagu Doughty's sober and majestic 600,000 word epic, Travels in Arabia Deserta (1888), (which took almost two generations to begin to find an enthusiastic audience and is, sadly, largely ignored today), has something delightfully misconceived about its "Englishman Abroad" premise which makes its rich Biblical prose style almost endearing, if not greatly approachable.
At first, Shana was enthusiastic about the new life she expected to begin after a brief period in detention.
"To begin with everyone was really enthusiastic," says Hussein. "We thought we'd get rich overnight.
When he first advises companies, invariably he instructs them to begin collecting genuine reviews from enthusiastic customers.
If you want to dip into the world of printables, it may be wise to begin your experiments alongside an enthusiastic hobbyist or professional who can guide you.
Trevor, who is at first enthusiastic, starts getting fearful as the trek is about to begin, but he rallies forth.
Paul was very enthusiastic about the project and very grateful to have an MBA student helping to perform the diligence required to begin a successful internal audit department.
Gernot's energy and enthusiastic spirit, from beginning to end of even the most intense meetings, was extremely appreciated.
