Algorithms and data structures are always the most complicated and confusing parts of programming

But DS and Algo are important and can reduce your efforts and help you solve the problem in a quick and efficient manner

Some great visualizers will solve all your doubts

https://cs.usfca.edu/~galles/visualization/Algorithms.html

- Learn DSA and visualize some complex programs. Definitely check it out.

http://clementmihailescu.github.io/Pathfinding-Visualizer/

- Dedicated to graph DS

https://toptal.com/developers/sorting-algorithms

- All sorting algorithms animations

https://visualgo.net 

- Visualizing data structures and algorithms through animation

http://algoanim.ide.sk 

- Collection of computer science algorithm animations and visualizations