How long have you been training?
What kind of training are you following?
Yes, you will do it. Probably not too happy at the end, but you will finish. For you, its not a race. Start slow, dont follow the crowd, take walk breaks every ten minutes (for one minute) if you want. Learn and enjoy is the theme of the day.
1:15 for 11k is very reasonable. Most people aim for sub 1 hour for a 10k. For you, dont dwell on time. Dwell on enjoying the run.
Get a good breakfast. Not the time to try something new. Stick to what works for you. Example, My wife has a bagel with almond butter. Last time I tried that, I burped the whole race and had stomach issues. Oatmeal is for me.
Keep hydrated and dress accordingly.
I trained a lot of people for half marathons and marathons, but dont do them myself, as I find it boring. 5-10K's for me.