I just want to post in here I've been approved for surgery what all can I expect

What questions do you have? After approval, you and your team work towards a date and testing...or do you mean your insurance approved your surgery?

My insurance approved me I'm due to get the sleeve on the 18th this month...what can I expect to go through next couple of weeks

You'll probably start the liver shrinking diet soon, which can be difficult, but start to write some reasons down to help you through the mental side of that process. Your team will tell you exactly what you need to do. Make sure you follow it closely as much as you can.

Also please know that everyone experience is different. After my insurance approved me and my surgeon gave me a date I started the liver shrinking diet and then a week before my surgery I had to have a day of testing. I had an EKG, blood work, and upper GI imaging. After the results I was cleared for surgery.

After that I paid the initial surgeon fee which was around $500 something and then I paid the hospital a down payment of $2,700 and then after that I had my surgery a few days later.

Does that help? More questions?

You'll probably start the liver shrinking diet soon, which can be difficult, but start to write some reasons down to help you through the mental side of that process. Your team will tell you exactly what you need to do. Make sure you follow it closely as much as you can.
Also please know that everyone experience is different. After my insurance approved me and my surgeon gave me a date I started the liver shrinking diet and then a week before my surgery I had to have a day of testing. I had an EKG, blood work, and upper GI imaging. After the results I was cleared for surgery.
After that I paid the initial surgeon fee which was around $500 something and then I paid the hospital a down payment of $2,700 and then after that I had my surgery a few days later.
Does that help? More questions?

Yes I start that tomorrow, luckily I don't have to pay anything and they did all that testing

It is very different from surgery center to surgery center. The best person to ask is the scheduler or NP at the surgery center. They will tell you what you need to do, including appointments, when to stop taking certain medications, special soaps to wash will before surgery, etc.