Primary resources
This link takes you to the Impulse section of the openstax college physics textbook.
The following resource is a nice summary but keep in mind that the author has not used vector symbols and you should pay attention to which quantities are vector quantities.
This video about Impulse, which includes a nice real-world example, can also help.
Secondary Resources
This site is very concise in its explanation of the graphical connection to impulse.
This example analyzes a 1D impulse problem.
This example analyzes a 2D impulse problem.
Other Resources
Boston U defining momentum and Impulse
Hyperphysics' Impulse explanation
https://hyperphysics.phy-astr.gsu.edu/hbase/impulse.html
Jumps a little into Energy, but pretty good to take a look at
https://spiff.rit.edu/classes/phys311.old/lectures/impulse/impulse.html
This website is just really good in general.
https://www.ux1.eiu.edu/~cfadd/1150/07Mom/Impulse.html
Rocket propulsion example w/ no calculus at all.
https://www.ux1.eiu.edu/~cfadd/1150/07Mom/Rocket.html
Physics Classroom on the connections between impulse and momentum
https://www.physicsclassroom.com/class/momentum/Lesson-1/Momentum-and-Imp...
Hyperphysics Impulse
https://hyperphysics.phy-astr.gsu.edu/hbase/impulse.html
Impulse definition with graphical analysis
https://www.physicstutorials.org/home/impulse-momentum/impulse
Intro to impulse. No vector arrows. Examples included
https://www.kgsorkney.com/uploads/1/4/9/3/14935550/3_3_impulse.pdf
ilectureonline Impulse delta P ball ricochet off wall
Very basic impulse problem, still with emphasis on x and y components
Second example of above link with alternate perspective
ilectureonline relating graph of force versus time to impulse and delta P
Very basic definition and example of impluse video
https://www.brightstorm.com/science/physics/energy-and-momentum/impulse/
Impulse comparison of three different demonstrations
https://www.youtube.com/watch?v=dtiZvnV-Pec
Collisions as explained by Crash Course Physics