The hardest part of an individual fundraiser is that some people may be suspicious or not understand your purpose. People are used to charities pushing for donations, but for a single person to be going out and doing that work on their own is a little different. It is up to you to present yourself in the best way possible, and to be professional and straightforward in your dealings.
As you explain what you are doing to your supporters, they will start to see that you are working toward a worthy cause, and they are more likely to support you in a more substantial way. You may also be struggling if this is your first time to take on something as daunting as a fundraiser all by yourself. But organizing an individual fundraiser isn't all that difficult - you just need to get the planning stages out of the way as efficiently as possible.
Keeping a positive attitude is of utmost importance, as is remembering your goals even when things get hard. Fundraising certainly has its difficulties, but that is overshadowed by the rewards that you will reap for your cause. Keep yourself focused on the things you are trying to achieve, and let your dedication show to everyone you approach for support. An individual fundraiser is a great way to do something great for a cause you believe in, so keep that in your thoughts at all times.