What’s your budget? There are plenty of bargain forks out there, with Tora and Reba both likely contenders secondhand.
Wouldn’t bother with carbon bars, you’ll only save 100 grammes or so over a £25 alloy bar. Funn Full on at CRC nice 750 mm bar.
If you want to save weight change your chainset to a Hollowtech 2, there are some bargain used slx or Deore out there, and if you shop round you’ll find new Deore for £40 from ze Germans
Lightweight tyres and even a lightweight wheelset will also help, but think long and hard whether the frame deserves such expense!