Verizon stopped accepting new CDMA/3G activations last year. You will need to get a modern 4G flip phone :-( ; thankfully they’re still a thing. Unless you want to do a short term AOL, which Verizon allows (and take on someone else’s phone and number for 9 more months and have your hand forced anyway), you’re stuck. They’re retiring the EDGE/3G networks by the end of 2019.
The shields on this phone (and most old Motorolas) are soldered. Unless you can desolder them without damage, you will need to take the phone to a pro. If it’s an issue with the solder and it cannot be reflowed, you may find yourself in that position (like it or not) since you will need to reball the eSIM after removal. Discrete components are not an issue and can be done by just about everyone.