Do you think 4:10 is a good first marathon finish time?

I feel like I am slow but I'm gonna still go for it anyway! I have a trainer that made a pacing chart for me and if I can run the marathon on pace I should be able to finish in that time. Also, to the guys what do you think about a girl who takes on a marathon?
Do you think 4:10 is a good first marathon finish time?
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