Can native English speakers tell the differences between [ɣ] voiced velar fricative and [g] voiced velar stop?
Solution 1:
First rule of English is that nobody in their right mind care about phonetics.
Second is that mistakes are a part of life, and overly clear, especially well articulated and grammar immaculate sentences are used by NNEs - as strange as that may sound.
So, if you can pass that however you pronounce it, and don't get really bad stares, it's all good. Carry on.