instagram business account

I've seen that instagram is offering businesses the option 'to be approved' to use their own checkout / payment solution and I am kind of leaing in that direction. Anyone currently using it and have good or bad experience to share? Also, anyone know the % they charge... (or can anyone recommend...

Please tell me anyone how many times I can switch my account from personal to business. I'm facing the problem on my IG account, there are showing a error of Limitation cross for this time. And 1 important thing I'm facing this problem from next 2 month. So, please let me know any solution for...

"Selling on INSTAGRAM" function isn't in my country yet - what may be the solutions to get it? The last notice I read about it dated from March 2018 just mentionned they are working to open it to many countries included mine... but 9 months after, no more news? It's probably a stupid question...

Read it somewhere that Business accounts have lower engagement rate than personal, as they want business accounts to spend money. Is that true? Does anyone know about it?

I wanna find out the demographics of my instagram followers for free. So can I just switch to a business account whenever I want and then switch back to a normal account later? I want to switch back cause business accounts get lesser engagement. Also do I need to have a facebook page to make...