“The first step is always the hardest.”
Right now, get out there everyday and walk, walk, walk or hike, hike, hike where you live right now even if you have to do it in snow and ice.
Hiking the trail is one of the toughest most physically demanding things a person can do because it is day in and day out for about six months or so. It’s really tough. So use the next few months to get yourself in the best physical shape possible (running, walking, hiking, going to the gym, etc.). And if you do that and do it right, then you might be one of those who makes it out of Georgia and maybe if you’re really in good shape and do everything else right, then you might complete the AT.
Your partner dropping out may be a blessing. It is most difficult to find a good hiking partner. The best thing is to find one on the trail, you are confortable with and you will find many of them. Just let it happen. And plan, but most importantly exercise, exercise, exercise.
Good luck. See you out there. :cheers
Maintain