Planning to get a /24 block, what to do after?

Hi, there we are planning to get a /24 block from Arin, and we getting some questions once we have one.

So we have currently one carrier giving us a Dedicated Fiber Line.

Do we ask our carrier to advertise our ip block and route them back to us?

Or do we need to get a second carrier and do a multi-home bgp?

Is there anything else we need do?

Never setup BGP before, and google-fu was no help.

Thanks!