[Help Needed] DS-157

The 14th question, “do you have any specific skills in firearms, nuclear, biological or chemical experience?” If the answer is YES, does it mean I will be checked?
I am very worried about that. How do you guys deal with this question? What kind of explain is best?

The 17th, “list all education institutions”, in “course of study”, how can I input all the courses I studied in such a limited space? Again, how did you guys do?

All input and suggestions are appreciated!