First time travelling US with 5 months valid h1B visa

Here is the scenario in my case:

  1. Valid petition ending 31 Dec 2017
  2. Got the H1B visa stamped in Nov 2016 and visa is valid till 31 Dec 2017.
  3. Never traveled on this visa yet. I am planning to travel by 1 Jul 2017

My question are:

  1. Would there by any issue in my case at the port of entry?
  2. What is the minimum validity required for traveling on H1B visa, especially when I have never traveled on that visa?
  3. When should my employer apply for the extension?
  4. If a person able to save 1 lakh in India after major expenses, is it right to go to US now with risk?
  1. There should be no issue at POE

  2. You can travel anytime before petition expires

3)Extension should be applied before 3-4 months of Expiry

  1. You should atleast stay in US for few months and decide yourself.