strange stresses unfamiliarity and may apply to the foreign, the unnatural, the unaccountable . singular suggests individuality or puzzling strangeness . unique implies singularity and the fact of being without a known parallel . peculiar implies a marked distinctiveness . eccentric suggests a wide divergence from the usual or normal especially in behavior . erratic stresses a capricious and unpredictable wandering or deviating . odd applies to a departure from the regular or expected . quaint suggests an old-fashioned but pleasant oddness . outlandish applies to what is uncouth, bizarre, or barbaric .

(MW)

Google -> unique synonyms -> profit!!!

If you want to improve your spoken English for social purposes, they should accept that you'll make mistakes. If not, as others have said, tell them to "идти лесом" ("tell them to go for a walk").

If, as you say, you want to learn to speak it for work purposes, the quickest way is still to mix with English-speakers as much as possible -- at work and, if possible, socially. That depends on where you are, of course: if you live in a village it will be impossible, but if it's a big city, look for English-speaking clubs. Whereabouts do you live?

ты сам ответил на свой вопрос, Карло (с)
надо общаться с простыми человеками )))

и теперь главное: быстро + много + правильно не будет. (придется выбрать что-то одно из этих трех. если повезет, получится два. но скорее всего нет, а будет например быстро + немного + иногда правильно)