I’m an experienced developer (MS Office apps, SQL, MySQL, websites)
Search the internet for the resources you need since you didn’t give anyone any clues about what you want to do.
@lousaint: Are you interested in solving Base problems? There are many bugs and not much people, who could solve this bugs: https://bugs.documentfoundation.org/
Contrary to MS Access, Base is a tiny addition to this office suite. How to do something with it:
Call menu:File>New>Database…
Connect to existing database
Specify the connection details for your ODBC or JDBC database. You can connect one database to one database document.
“Registration” under some name makes tables and queries accessible for Writer and Calc.
Save the database document.
Add meaningful queries. Queries that are flagged as “direct SQL” are “pass-through queries”.
Forms are attached to ordinary Writer documents that are embedded in the Base document. it is possible to attach forms to stand-alone documents (Writer, Calc, Draw).
Editable relations can be implemented by means of listboxes and subforms.