Hi Jorge Luis,
First of all, my apologies for this very late answer!
Depending on your setup, you will have to play a bit with your machine parameters to find your optimal range. One general tip that can work for a lot of people is to prefer the portrait format (as opposed to the landscape format) when taking pictures for use on Instagram, and also to prefer the format 9:16. Make sure you leave plenty of 'white space' around your subject as this generally gets cropped out to suit the Instagram format.
There is also this support article online that you might find useful to resize images for Instagram : https://www.adobe.com/express/feature/image/resize/instagram
I hope these tips can help you to optimise your work for Instagram. Let us know how you get on!
Have fun with your creations!
Gwen