英语表达：如果您能在百忙之中，给我一些私人的指导我将十分感激。

其他的同意楼上sundy的
有一处,我说说我的,见笑了
I know you are busy,but I will quite appriciate if you can give me some private advices

Your private advice will be highly appreciated at your convenience.
或者 I would feel grateful if you can give me your personal advice at your convenience.

I will owe my gratitude to taking your time and trouble to guide me.

I will appriciate it very much if you can give me some private advice during your busy work.

I'd appreciate it if you could give me some tips/share with me some of your experiences when it is convinient for you.