Is this sentence correct?

Hello everyone! I've been studying Japanese for a few months, but it's always the sentence structure that gets me when it comes to Japanese.
I want to try and blog(in Japanese) about my daily activities in order to get a better grasp of the language because of it. I'm just unsure of some of the things I would say.
For example; would the following be correct?

Right now, I'm driving to school.
Ima, gakkou ni kuruma o utenshita.

Additionally, I'm a bit lost on de vs ni...
IE,
I'm waiting here for my friends.
Koko ni tomodachi o aimasu.

Or would it be
Koko de tomodachi o aimasu

Right now, I'm driving to school.
Ima, gakkou ni kuruma o utenshita.

Your sentence says "(Just) now, I drove a car to school," assuming it is "unten shita."

If you want to say that "right now," as we speak, you are on your way to school by car, you'd say:
- Ima kuruma de gakkou ni mukatte imasu.
(I'm heading to school by car right now.)

Have you picked up the "te-form + imasu" expression to talk about what you are "doing" now? :)


I'm waiting here for my friends.
Koko ni tomodachi o aimasu.
Or would it be
Koko de tomodachi o aimasu

Somehow you are using the verb "aimasu" meaning "to meet up," instead ot "to wait (for)."

If you want to say "I'm waiting here for my friends":
- Koko de tomodachi wo matte imasu.

If you want to say "I will meet up with my friends here":
- Koko de tomodachi to aimasu.