What are my chances of summiting Kilimanjaro?

I'm an 18 yr old girl. I'm in good shape but have no experience climbing mountains. I'm taking the machame route and it is an eight day climb which gives us a lot of time for acclimization. I have read that most generally fit people can do it unless they're hit with altitude sickness (which strikes randomly). With the extra time I can avoid that but what do you think my chances are? I am fit but not a star athlete. I weigh 135 and have a lot of lower body strength. My gear is also being carried by a porter.