You should stick to your current goal.  Don't 'try to' use such cliches-- they must appear reasonably naturally.  Idioms and slang both suffer at the early use of non-native speakers, who are not familiar enough with the language or speak it constantly enough that such casual phrases can be dropped in appropriately and without premeditation; more often than not, they are misplaced.  In speaking, just use good, 'standard', neutral English.

On the other hand, you may be a brave, ambitious fellow who is not afraid of making mistakes or being corrected-- in that case, go right ahead and try them out.  Your interlocutors will usually let you know if you have used them appropriately.

I can certainly assure you that the regular use of such cliches and phrases is a normal part of any native speaker's speech.  There are very few who use them to such excess that their speech becomes shallow.  And they do not damage the thinking process in any way, shape or form.

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My advice is to ensure that you have the form of the idiom correct and haven't inadvertantly changed any of the words. That is always far more jarring to me than someone using a correct idiom in the wrong context.

I know a lady who like 'out of the blue' (meaning suddenly and unexpectedly) but unfortunately she always says 'from the blues' and it just makes me want to laugh, it sounds so odd. But I don't react as strongly when she just says something correctly, but out of context.