Need to finish / fix WP-based site errors

Need to finish / fix WP-based site errors

There is a site based on WP, but the layout is bad: plugins come into conflict, disable functionality, are not updated, sewn from 2-3 themes, themes also come into conflict after updating and turn off functionality.
It is necessary to put all the code in order the work of the plugins to configure so that they are updated and do not conflict to update the themes and configure it in the same way that there is no conflict after the update or combine into one of their themes. After putting in order already externally, so that the functionality works, fields, etc., everything was correct, adaptability, for all browsers, and so on. Add a couple of plugins and functionality.
Knowledge of java, python / html is required.


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