Reddit mentions of Schaum's Outline of Logic, Second Edition (Schaum's Outlines)

Despite being offered by the philosophy department, logic is much like a math class. It's best to treat it that way when it comes to studying. Do as many practice problems as you need -- there are plenty exercises around online and in textbooks. Schaum's Outlines is dirt cheap.

The pace of the class shouldn't be too bad -- UCD dedicates a full quarter to just propositional logic. It's common to see 12 and 112 combined in a single class.

The course will follow this rough outline:

• Learn the logical language and syntax. Then translate natural language sentences into the logical language. The major step here is understanding the connectives, which are the words like 'and' and 'or' used to construct complex propositions out of simpler ones.
  
  
• Then you'll learn the semantics, how the truth value of a complex proposition is determined from the truth values of its constituents and the manner in which they're combined. The technique used here is the truth table method. Truth tables are completely deterministic -- if you learn the process and practice, you'll have no problem.
  
  
• Next you learn the syntactic method of proofs (usually in what's known as a Fitch-style natural deduction). These are used to show which deductions follow from given assumptions, without any attention paid to the specific meanings of the sentences -- just the manner in which they're constructed. This is typically the hardest part of the course for students, because they won't teach you a simple process to solving them like truth tables. But again, if you practice, and learn how to work backward from the goal, it's not so bad.

If you grew up in the US under "no child left behind" and are not mathematically / scientifically inclined it might be a challenge.

At least at my university the logic courses replace math requirements. Many students end up taking them thinking they must be easy because "hey, it's not math!" However, they kind of miss the implications of being able to take logic as a math equivalent.

Moreover, for various reasons philosophy is not usually taught at the K-12 level in public schools. I find that students are generally able to summarize readings and regurgitate lectures, but struggle with actually putting it all together in analysis and application.

If you want a head start pick up something like Schaums.

Edit: when I can choose the textbook I usually use a version of this. This seems to be a nice balance between logic and informal logic.

https://www.amazon.com/Schaums-Outline-Logic-Second-Outlines/dp/0071755462 if you really need a crash course.