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go professional; turn professional; turn profession; become knowledgeable about (в какой-то области знаний A.Rezvov); make it to the pros (He's a heck of a ballplayer. I wouldn't be surprised if he made it to the pros someday. –  thefreedictionary.com dimock) | |||
| turn pro | |||
| go pro (He worked as a freelance journalist for a couple of years before going pro. – efl.ru dimock) | |||
| стать профессионалом: 1 phrase in 1 subject |
| Makarov | 1 |