When should I start learning the next data structure?

Hi guys.
I’m learning ds on my own and am in 1st year. I have recently covered arrays and linked lists and have solved some ( 10 - 12 ) easy and ( 3-4 ) medium level questions from each topic on sites like hackerearth and gfg. So is this a good number of questions to give you a good “feel” about a particular data structure? After solving these many questions, can I move on to the next ds?