Transfer records from Wordpress to Instant CMS (Mysql)

Hello.

There is a site on Wordpress, you need to move the records to InstantCMS.
In fact, make a transfer from one base to another by converting/matching the data, or what else to call it.

Data from one entry:

Category
Date
-Heading
Text
-Author, name
And the comments:
-author of the comment (no profile, just name)
-email
Comment text

No more data, one text. Its all in the tables. The structure of the Wordpress base is: