F5 101 and 201 Examination 2018

Might sound obvious but get some hands on experience (especially for 201) If you don't have access to any devices get an Eval copy. Read the exam blueprints as these will tell you what you need to learn.

https://support.f5.com/csp/article/K29900360

There are some great resources on F5 university too, this is free and very useful especially for the entry level exams. You will even find some study guides on there which will help guide you through the Blueprints

https://university.f5.com/