1. You do not need or lawyer and yes you can fire the current and switch or do without any.
2. But, in the stage of waiting for a shipped document it a terrible point. You would need to report the card missing and add a change of address.
3. Major point: send a change and address and have everything rerouted to you. This can cause delays.
I would definitely try my best to hunt my current card down and then change address after. But if it’s impossible then report lost/stolen but this can cause delays while researching.
good luck