Good start Mister,
Your shirt seems to fit.
You need to do your collar button and cinch the bright tie up nice and tight.
Find yourself a set of cuff links, a Jacket, and a Pocket Square to finish the outfit off.
Dark charcoal (just off black) trousers & black shoes (monks, if you want something shiny down there to balance the bright tie/square)..
I know this was awhile ago, but these lapels look pretty similar:
What brand is that jacket and where did you find it? If it was a thrift store find it may be more of a 'fashion' jacket that needs better context, the only reason I suspect this is because the tailoring on it looks pretty nice.