How do I get prescribed medication without a job?

I have a good job, here in FL, as an Office Manager. I am trying to plan a move to CA and do not have a job there, nor am I sure how long it will take me to land a job there.

I take a prescribed medication for MS and will, of course, have to continue taking it. This is where my questions come in. Were I not taking it I would just pack up and go and land a job with insurance as soon as I could. But I cannot do that – I need to make sure I have a way to get the medication (Avonex) coming to me seamlessly, without break. I am a 38 yr old F.

Does anyone know what the steps are that I need to take right now? I suspect it must have something to do with Medicare but I have never applied for things like that and have no idea what it consists of.

First of all, I imagine I cannot apply for that until I have moved to CA and have no job. In other words, I could not go tomorrow, here, and apply for Medicare when I am employed here, right? Also, is Medicare guaranteed to cover this for me? Thx