Instagram Hashtags

Is it better to use hashtags on the post status or in the comments, and how many hashtags are too much ?

It really doesn't matter where you place them. If you're using a caption that includes a call-to-action you'd want to keep it less crowded so you can opt to put them in the comments.
Regarding the nr of hashtags - 11 minimum and you can use up to 30.
But more importantly they should be relevant. Also check what your competitors are using. Do some tests and see what works best.

i think max 3 hastags are best! A lot hastags can be spam.