Hi @aristorinjuang,
Welcome to the community forums!
You'll find information on StackExchange too and you can start diving into the http://devdocs.magento.com/ not only for learning but to correct and improve the docs.
Another recomendation could be to be aware of Magento issues on Github: https://github.com/magento/magento2/issues (if you are technical, of course).
Also, you should read this post: https://community.magento.com/t5/Welcome-to-the-Magento-Community/Start-here-and-hello-from-me/m-p/5... (in particular the guidelines) and if you are not sure about how to use the forum you can read the FAQ: https://community.magento.com/t5/help/faqpage.
If you need information related with GDPR, you should check this: https://community.magento.com/t5/help/faqpage#gdpr
Finally, you'll need to get your hands dirty with the platform.
Regarding your question maybe you can check this link to have an idea to explore: https://magento.stackexchange.com/questions/125358/setting-different-title-and-meta-title-for-a-page
Cheers.
