HI SILVIA! Nice work on your corrections. 
Don't be disheartened by small challenges like missing articles ("a," "an," "the")—they're common hurdles for many learners.
Your dedication and hard work are truly inspiring. Keep pushing forward, and you'll continue to make remarkable progress!

Please take note of the below; 
1. I've been travels many places today.
--> I've been to many places today. or I traveled to a lot of places today. 
 

2. We discuss about the orientation.
--> We were discussing orientation of the lecture. 
CORRECTION: We were discussing the orientation of the lecture. 

3. Get a new name card for the professor.
--> I got a new name card as professor.   
CORRECTION: I got a new name card as a professor. 

4. I went to the market to laundry shop.
--> I went to the market to visit laundry shop.  
CORRECTION: I went to the market to visit the laundry shop. 

5. As you know that, like a steroid makes a immunity.
--> As you know that a steroid makes a immunity.
CORRECTION: As you know, a steroid can boost immunity.

6. The position medium low, maybe the 5 level.
--> The level of the steroid is medium low.