You are asking the wrong question. This idea that “DIVS” are somehow good and tables are completely bad is utter stuff and nonsense. Overuse of the DIV is just as pernicious as the use of tables for layout.
Since most of the content in your body is tabular you should not change those parts from tables to divs. That said You can have a container of course holding the tables. What you need though is to clean up all the styles, id’s and classes now applied to those tables and bring them over to a stylesheet
The idea of changing a website to use semantic HTML and CSS is to use the tags for their correct purposes. The problem you’re experiencing is that you’re using tables to build your structure, rather than for tabular content.
No one is going to do your work for free. If you’re looking for someone to recode or redesign your website you’ll need to hire a web designer.
Aside from the issues with the general layout the use of tables for tabular content isn’t too bad, although the code could be ten times cleaner. If I were you I’d get someone in to recode your site fairly soon so you have a cleaner, standards-complaint site that will load faster and will eat up far less of your bandwidth.