Ok,
Job is done, I dropped the pan, it was light brown which I think is normal as its due as Eric mentioned.
The only challenge was to figure out which is the input and output to the transmission cooler(I figured it out after making a mess) and since some fluid spilled out it was a challenge to know exactly how much fluid to put back.
The drain plug was almost clean really.
After all, the fluid was exchanged with a new one, looks the way it should, and the level is at full.
I drove it for 15 Mi on the highway and everything seems to be smooth and normal.
Being said, its really up to you if you just want to drain and refill or to exchange the whole fluid, be careful not to make the transmission go dry if you decided to go for a full fluid exchange, also put the oil pan underneath the car just in case the tube get lose as it happened to me 🙂 , its a good idea to have someone helping you turning on/off the engine once you are done.
As most of us know, this is be done to transmissions with low mileage or these ones serviced along the way. on high mileage drain and refill.
I welcome any questions or comments.