Personally, if you're not familiar with CSS and divs then I would advise you to spend your time on the rest of the site. Tableless design gives less code bloat and makes it easier to read through the code but there's no real
SEO benefit unless your pages are massively cluttered with code, making the content hard to find. Even then, it's debatable.
If you're comfortable with divs and CSS, go for it. If you're not, I see no harm in using tables. CSS/divs are just nicer and cleaner. However, 'nice' often isn't a good enough reason
Good luck!