Half Marathon after 2 Months Training?

So i registered a few days ago for the Amsterdam half marathon(18 oct) and now i am panicking if I will be able to make it. I am a casual runner and pretty average (6 feet 4 and 180 lbs 23 years old) used to put in maybe 60-70 km per month but i tore my ACL last year and did not run for 8 months and just started running again last week. I am typing this now after going out for a run(8km in 43 mins) and I want to know will I be able to finish the half marathon in 2-2:15 hours? I came across a few 2 month guides but I have no idea which one to follow! Help will be appreciated.