initially every electronics student feel like this, glad to help you with your query.
my suggection is, if you have basic knowlegde of electronic components like transistors, resistors, capacitors. pleasde try to play with them. and find some easy circuits in web and practice them. if you got error, try to solve it. if you can not post query for expert support.
to know well about electronic circuits only way is try do something with them, if possibble try to implement your own idea.
you can find many electronics circuits in "electronic circuits" and "circuit design" tabs.
all the best.