So I downloaded Odoo 13 Community Edition with and all the modules I need. Now I just need to configure these modules to fit my needs. I never edited a module before or anything so I need to know basic stuff like:
How do I override stuff?
How do I find the files I need on my computer? (I already know the Odoo directory but I don't know how to navigate in it)
Can I use javascript to help me?
How can I create a table inside the product view which details the history of purchases of that product?
How can I edit base fields?
Please help me... I'm so lost
Maybe you should learn the default functionality and features first, explore the functionality provided by OCA (Odoo Community Association www.odoo-community.org) and understand your business needs, before you start thinking about programming. If your business setup is proper and you used the inbuilt customization possibilities, you don't need programming for 98% of the relevant business requirements and for the rest it is most probably not worth the efforts. You will pay an extraordinary high price, if you want to migrate your custom developments to newer versions.