Fashion Mags and blogs are good places to start..
When you shop at your favorite stores it's best to take a friend or ask the associates who work there for suggestions on your look.
It's going to be trail and error and some time, to find what works
It's taken me 2 years since changing from a urban look to a more form fitting and I think better looking clothes and I'm still throwing out clothes to this day. But to each it's own when in doubt, a nice fitted white t-shirt and some fitted blue jeans is never a bad look.
Best of luck to you