How to become an amateur/pro boxer?

Hi, I'm 16 years old I live in the UK and I've been boxing for about 2 years now and my record is 2-0 so I'm undefeated so far on my journey but I was wondering when I could turn amateur and even pro. Also how can a boxer get sponsored so that they can train in Las Vegas or somewhere. Thank you.
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[193] There is a discrepancy in the statements concerning the "Boxer's" crew. Hull reported officially, "We have sixty-seven, exclusive of those killed and thrown overboard." (Sept. 25. Captains' Letters.) Lieutenant McCall, who succeeded to the command after Burrows fell, reported that "from information received from officers of the 'Boxer' it appears that there were between twenty and thirty-five killed, and fourteen wounded." (U.S. State Papers, Naval Affairs, vol. i. p. 297.) The number killed is evidently an exaggerated impression received, resembling some statements made concerning the "Chesapeake;" but it is quite likely that the "Boxer's" loss should be increased by several bodies thrown overboard.
As recorded in detail in chapter 5, George was undoubtedly the first Greek amateur to have two-way contacts using radio telephony, way back in 1921. He was also the first amateur to operate from the island of Crete in 1938.
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