@ahmed dawoud , I would suggest start with some video tutorials present on one of the learning platforms like:
- LinkedIn Learning
- PluralSight
- Oreilly
You can also try out this book: https://www.oreilly.com/library/view/exam-ref-az-103/9780135466551/
Or take a look at ways to prepare at the bottom of this link: https://learn.microsoft.com/en-us/learn/certifications/exams/az-104
Hope this helps. Do let us know if this helps and if there are any more queries around this, please do let us know so that we can help you further. Also, please do not forget to accept the response as Answer; if the above response helped in answering your query.