Verizon TP2/new network/Android OS

[tp575]

I'm new and not very tech savy in this area. But I'm trying to learn. I've researched my questions over the couple of weeks and I've spent the last 8 hours reading various forums and have read "yes you can", "no you can't" on similar questions.

Some background: I own a VZW TP2. After 8 years, I discontinued my VZW service due to a billing dispute. They say I owe them money for a replacement phone I received under my insurance plan (touch screen stopped working). I say a $500.00 bill for a replacement phone that was insured to be replaced for free....isn't free and I'm not paying it.

In basic form I want to be able to talk/text. If I could download data and have the FM radio working that would be a plus. Calling/texting internationally to friends and family would be awesome too.

1) I want to use my VZW TP2 on another network.

The VZW TP2 has a sim card and is supposed to be a "world phone" with multiple network capabilities (CDMA/GSM). What do I need to do in order to be able to use it on another network. I'm only interested in the networks that will work.

2) I want to install the android OS for this phone.

I've read about:

Flashing ROMs
Unlocking phone
Unlocking SIM card
Installing various programs
Yes this phone can work on GSM networks
No it can't work on other GSM networks
No this phone can't work on another CDMA network

What order do I have to follow in order to get to my goal.
Install android?
Unlock phone?
Find a carrier?
unlock sim card?

If I can't use this phone on another carrier, at least I can learn to unlock, hack, install, software customize - whatever they call it - a phone for future reference.

Thanks for you help in advance.