Oh, how hard, frustrating but happy was those gone days studyng chemistry at school and the exams, no tell
Definitively Aikido should be easier than that!!
And it depends how far you want to go in your Aikido training, I see plenty of people in the dojo I attend that just take ukemi, do some kotegaeshi, make it look nice and decent and Thats it! Aikido without frustrations!!
Train and Enjoy!!