This is a profound question that lies at the very heart of mortal experience, particularly as described in 5th Epochal Revelation contained in the Urantia Book. The short answer is that the will of the Universal Father is not about perfection of action, but about the perfection of your will—your sincere and unreserved choice to know and become like him.
Since you are an imperfect mortal, the Father's plan is specifically designed for your progressive spiritual growth.
Here is a breakdown of how you can understand and align your behavior with the Father's will in your mortal experience:
The most important step is the unreserved consecration of your human will to the divine will. This is a singular, volitional choice that sets the course for your entire ascending career.
You are not left alone to interpret the divine will; you have a divine partner. The Thought Adjuster (a fragment of the Universal Father) indwells your mind and is your primary guide.
On a practical, behavioral level, the divine qualities are revealed in the time-space universes as Truth, Beauty, and Goodness. Seeking these, and living them out, is the practical expression of the Father's will.
In essence, living the Father's will means loving God supremely and loving your neighbor as yourself, which is manifested through a daily life of spiritual growth, devoted service, and truth-seeking.
Your imperfection is a feature, not a flaw, of the evolutionary plan. Your mortal life is described as the "vestibule" to your real life of ascending growth.
Therefore, your goal in the mortal experience is not to achieve absolute perfection, but to make the crucial, final, and eternal choice of dedicating your will, and then living each day in the faith and effort to be more like the Father.