Hi everyone
I am a beginner opting to write step1
Which is the best time for me to give my exam
I would be happy if any gives me a guidance to way of my preparation
I stay in Dallas

The timing would be dependent upon your schedule and fundamental knowledge base.
I would begin by prioritizing the resources you use followed by creating a schedule that you will be able to strictly adhere to.
First Aid is used as a resource by many. In addition to the relevant medical material there is an outline for a schedule of application and certifications which would be useful for you.
best of luck!