I've recently come to love the idea of setting a primary goal and then stretch goals for a race. I define the primary goal as "Finish the race." Then the stretch goals allow me to address things such as time, pace, intervals, character photos (to this point I've raced exclusively at runDisney events), etc. I like the idea of stretch goals because it's something to work towards, but is also something that I can adjust if necessary on race day. Goals are something we should work towards, but it's important to not get so caught up in the pursuit of these goals that we miss the more important larger picture. A stretch goal allows you to progress towards something at the race, but also gives you the ability to realize that maybe it's more bad than good on race day. If I injure myself in obsessive pursuit of a goal then did I actually benefit myself? I had a stretch goal for Dark Side weekend this year. I absolutely failed in that stretch goal, but I realized during training that I could either pursue that stretch goal at the expense of injury or I could slow down, train healthy, and finish healthy.
Maybe some day I'll run a sub 3 hour half marathon. But even if I never do, I can also honestly say that I've finished 9 half marathons. Which is 9 more half marathons than I ever dreamed of finishing back when I started this back in 2011. I've gone from not even daring a 5K and Half on back to back days because I feared it would destroy my chances of finishing that half to successfully finishing with great times for me multi race challenges and will be running my first marathon as part of Dopey this January.
From your questions and responses, it sounds like you've got this all in perspective. As much as running can be very individual, we learn so much from the community. Sometimes a plan needs to be adjusted. You can make your current plan one of learning what works for you.
Failure only comes if you don't get up again. Or as one of my favorite exchanges in the 2005 movie Batman Begins says:
Alfred: And why do we fall Master Bruce?
Bruce Wayne (after a failure): So we can learn to pick ourselves back up again.
From when your race is compared to now, you have plenty of time. I went from having never run at all to finishing a half marathon after very hit and miss following the Galloway plan for the 2011
Disneyland in 4 months. Or about the time his plan outlined. Adjust your plan as needed and don't be afraid to get feedback from the community.