Since your goal is to make life easy for your reader, typed copy is close to essential. A typed report will not give you higher marks by itself, but anything that puts your reader into a better mood cannot hurt. Remember, your reader is likely to have dozens of papers to grade, and other commitments. Further, I recommend typing it yourself, for several reasons. Most people can type faster than they can write neatly, and those that cannot yet do so will improve with practice.
Secretarial help is expensive, and is becoming uncommon even in many businesses.
When trying anything for the first time, there is no substitute for a good example. For report writing, you should consult scientific journals, to compare advice here with what scientific writers actually do. Notable for their clarity of format are biological journals like the Canadian Journal of Botany, and Canadian Journal of Microbiology. Your scientific paper should be divided into sections , to organize communication of your work and thoughts to your reader. Lab 4 - Dependence of photosynthetic activity on wavelength of incident light.