I have 3 - 4 years experience of using adobe analytics reporting tool and planning to take certification but I see there are 2 certification
AD0-E208 Adobe Analytics Business Practitioner Expert & AD0-E202 Adobe Analytics Business Practitioner Expert
As this is my first adobe analytics certification I don't know which one to select AD0-E208 or AD0-E202.
Also how much time can I take for exam preparation ? 2 - 3 months?
I've only taken AD0-E202, as AD0-E208 is new. Unless they changed the AD0-E202 exam in the last year, a number of the questions were very in the weeds with how Adobe Analytics worked and the whole thing felt a bit dated. Reading through what someone should be familiar with in order to pass AD0-E208, the description sounds like the exam deals with the way that you'd interact with Adobe Analytics today rather than 5 years ago. I'd consider AD0-E208.
You should start with AD0-E202. Also, if you have 3-4 years hands-on experience with Adobe Analytics, you can revise for a week and appear for the exam. It's not difficult and anyone with practical understanding of the reports and familiar with the tool should be able to clear this.