The Scottish Church for centuries held the standard for reformed Christianity. Her history is the most important, the most exciting and the best to learn from.
For beginners and scholars alike, here is a massive collection of resources on Scottish Church history, organized by the time period.
Apart from researching a dissertation, it will probably have everything you need to answer just about every question you may have about Scottish Church history. Here is the treasure of the public domain (and more) on the topic.
We hope it is a blessing to you.