"Necesito aprender (tenses wil be something like "tiempos gramaticales", "conjugacion del tiempo", "tiempo verbal" or simply "tiempos).
Tenses, at least from my point of view are simpler than the one in enligsh (perfect, imperfect, present, blah blah).
In spanish, we use past, future and present.
In the case of the past (pasado) we divide it on 2 (pretérito and copréterito)
The first one, "pretérito" or "simple past" or perfect past, its for example:
Yo comí ( I ate), Tú comiste (you ate)....
The second one, "Copretérito" or "imperfect past", this second one is a little bit difficult to explain but is not really that hard to use. Using the same verb "COMER" (to eat) it would be something like this:
Yo comía (I used to eat ), Tu comías (You used to eat), El comía ( he used to eat ).....
As you can see in the examples above, the "copreterito" shows an action which happened in the past but not really explains whether is still happening or not...
For example..."El comía muchos tacos"... He used to eat a lot of tacos...vs "El comío muchos tacos"...He ate a lot of tacos....see the diffrence?.
Other verbs yo want to express in past simple for example "Soñar" (To dream). will be like this:
Yo soñé, Tu soñaste, El soñó....He dreamt(or dreamed), you dreamt, he dreamt.
but in "copreterito" the verb changes to...
Yo soñaba, Tu soñabas, El soñaba....I used to dream, you used to dream,he used to dream.