# How to start customization into code level

**URL:** <https://discuss.openedx.org/t/how-to-start-customization-into-code-level/5241>\
**Category:** Development\
**Tags:** how-to\
**Created:** [June 22, 2021, 8:43am UTC](https://discuss.openedx.org/t/how-to-start-customization-into-code-level/5241 "2021-06-22T08:43:28Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![bivashKantiPal](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/bivashkantipal/32/2606_2.png) [@bivashKantiPal](https://discuss.openedx.org/u/bivashKantiPal)\
**Post date:** [June 22, 2021, 8:43am UTC](https://discuss.openedx.org/t/how-to-start-customization-into-code-level/5241/1 "2021-06-22T08:43:28Z")

</div>

I have installed **devstack** and koa.master branch. Now i want to know the from where i have to update or customization. How to understand openedx core. etc .

Please suggest me any tutorials for beginner level code modification.

---

<div class="post-metadata">

**Author:** ![mahyard](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/mahyard/32/54_2.png) [@mahyard](https://discuss.openedx.org/u/mahyard)\
**Post date:** [June 22, 2021, 2:26pm UTC](https://discuss.openedx.org/t/how-to-start-customization-into-code-level/5241/2 "2021-06-22T14:26:37Z")

</div>

hey  
have you seen these documents?  
[https://open.edx.org/community/develop/](https://open.edx.org/community/develop/)  
[https://edx.readthedocs.io/projects/edx-developer-guide/en/latest/](https://edx.readthedocs.io/projects/edx-developer-guide/en/latest/)