Welcome to the community forums and Happy to see you on Magento Forum!
This community forums is a very good platform to ask the questions and try to help others.
You can also start diving into the http://devdocs.magento.
You can get an idea about the already reported/existing issue from Github: https://github.com/
Also, you should read this post: https://community.
You can ask also question to Magento Community Manager @sherrie if you have still issue.
You can always share your thoughts on this platform and yes definitely you can get help from existing community members as well
Looking forward to your contribution on this forum.
Welcome to the community forum !
Glad to know that you are building a demo site to learn the platform ! Magento natives comes up with the bunch of out of the box functionality so you can explore that as well and then try to learn customization as well.
For rest of the information you can follow the guideline shared by @Vimal Kumar which gives you more idea to understand the platform and you can always post your queries on this forum in respected section.