The present tense is underestimate, but is the foundation of the language and also is more usefull than people expect.
The common use of course is: 1) to describe an action happening now.
I see Ana – Veo a Ana
You open the door – Tú abres la puerta
They eat pizza – Ellos comen pizza
2) To express actions that took place regularly, in a habitual way, although the actions may not be occurring in the present.
Usually, he eat vegetables – Usualmente el come vegetales
I often take a walk during my lunch break – Yo camino durante mi tiempo de almuerzo seguido
Sweets usually made her thirstier – Los dulces usualmente le hacen sentir más sed
3) To describe events that will take place in the near future.
I will travel to the beach this summer – Este verano viajo a la costa
Tomorrow we will see the pictures – Mañana vemos las fotos
4) To ask questions requesting permission or someone´s opinion or preference.
Do you drink coffee or tea? – ¿Tomás café o té?
Do we buy this chocolate? – ¿Compramos este chocolate?
(Keep in mind that the auxiliary verb “Do” in English is not translated. In Spanish, an auxiliary verb is not needed to ask a question.)