Sponsorship goals and opportunities

I’m a high level athlete (freestyle wrestler) who has plans to travel and compete around Europe this year. I live in Australia meaning travel fees ect. will be expensive so I’m hoping to amass some sponsors to help pay for the trip. It may be me being overly optimistic, but I very much like to believe that there is a group of businesses and companies that would very much like the international publicity and marketing I could offer them during my stay. I will no doubt meet and come into contact with thousands of other athletes as well as the general public, so I definitely think there is room for widespread advertisement.

My only concern is that I don’t know which potential companies to contact and how to effectively get my message out there.

Am I being overly ambitious?

Any feedback is appreciated