Learning D for a non computer science background person : pre-requisite knowledge?

[Mayuresh Kathe via Digitalmars-d-learn]

While I have been a programmer for close to 23 years, it's been 
mostly API level code cobbling work.

Would like to learn "D", but am a bit intimidated by the fact 
that I don't have much of a grasp over the foundational stuff 
(discrete mathematics, machine organization, etc.) and hence am 
preparing for the same.

Would like to know if there be anything else I should work 
through before approaching "D" via Mr. Alexandrescu's book.

Thanks.