Kierkegaard is notoriously tricky to read so a good place to start is:
Kierkegaard: A Single Life by Stephen Backhouse
Various people agree that Backhouse does all the hard work of reading Kierkegaard and summarising him without being boring.
This Intro to Kierkegaard youtube is fun
And/or if you want to read the books for yourself Google ‘søren kierkegaard books list’ and check out reviews etc. [There’s a LOT of books!]