Transfer of data from a local database to the website

Good day. I have a question: there are three tables written in Paradox linked by a key field. In the first table, roughly speaking, there is the species name of an organism, in the second table its description, and in the third table its photograph. The task is to insert the species name into the article title, and its description and photograph into the body. The photograph can be inserted separately as an img. How much could this cost? Or could you advise where to start in order to write it myself? I know some PHP, but I do not understand Drupal’s structure well enough to know from which table to insert data and where. I have heard about the migrate module, but how to approach it and where to start? Or are there other ways to implement this?