Talk to Sexologist on Varicocele Grade 2

I am currently residing in the UAE. I was recently diagnosed with grade 2 varicocele. It’s been 7 years, and we haven't had any children. I’m planning to get the surgery done around Faisalabad or Sahiwal. After this surgery, how much improvement can I expect in my semen report? Will the chances of natural conception increase after the surgery? Will I be able to travel again? And which type of surgery is better to ensure that this issue does not return in the future?"