fix user_guide and tutorial docs

[yoosful]

Description

Fixing typos and clarifying instructions to improve clarity and readability of the user_guide.

Fixes # (issue)

Type of change

• Documentation update (non-breaking change which enhances the documentation)

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes
• I have added the relevant labels to my PR in so that relevant reviewers are notified

[peri044]

Thanks. LGTM