I am new to Unreal ... So mY Question Is How to be Fmailiar with Nodes In Blueprint?

I am new to unreal engine & am started watching tutorials . but still cofuse . i want to know how to be familiar with blueprint nodes. what does it actually do …

Hello there, a month ago I was in the same pickle.
I finished this one first and then the next one, until I was comfortable enough to try some straight from Documentation :

This playlist (official) was also super helpful, if you don’t have an hour to spend, the light toggle blueprint gives the brain the short burst of endorphin it needs. (slow hook):

If you are like me and likes to commute and read on the go then :

you learn the node, what they do and what nodes there are through time and experience. the place that i started out was the unreal engine video tutorials which are now on their youtube channel. after learning the basics of the engine i would find other small tutorials that seemed interesting, make them, then tweak them to create something new. theres a ton of great channels on youtube many of which are made by names youll see here on the answerhub and forum. a few off the top of my head are nebula games, titanic games, dean ashford, and rats game.