A rosary is just a tool to help you keep track of your prayers. If one really wanted to, you can pray the rosary on your hands, no beads required.
The different rosaries are just apart of different traditions and help you pray different rosaries for different reasons. Your standard rosary
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Your local parish ought to have some lying around the chapel. You can pick one up or ask the preist to give you one.
Chaplets are different than the rosary as they usually have different prayers associated with them.
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The saint Michael chaplet is going to be different than the standard rosary in the amount of beads and prayers associated with it.
If you want to start praying either chaplets or rosaries, I would download the “Laudate” app for your smart phone.
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The app is 100% free and contains virtual rosaries and chaplets as well as a whole database of prayers and two versions of the Bible.
That would be a good place to start