I have 2 questions :
Thank you very much for your help
Thank you for your questions.
where can I change the share button at the end of the post ? Can I delete it ? (please see pictures)
You can’t change it but can remove it from theme Blog settings as shown in the attached screenshots.
What does the small orange circles means on the side bar next to blog post picture ? Can I delete it ? (please see pictures)
Those are comments count which you can remove using the solution shared in the following topic.