Tails + Proxychains + Tor???

[nomad]

My question is this:
I have installed proxychains as well as dnsutils. The more I read about the subject and the more I'm starting to understand that people don't actually use Tor to card?
Setup: laptop --> Tails (USB) --> Tor
Wanted: laptop --> Tails (USB) --> Tor --> Proxy --> Carding POSSIBLE?
If I understand well, people have a 2nd browser installed inside Tails (Firefox, Iceweasel etc ...) where they can run proxies and vpns freely?
Because Tor and Tails won't allow you to run proxies after Tor? Right?
How do you guys go about all of this? I'm a bit confused.
I would really appreciate your input on this as I'm about ready for my first time . I have been educating myself for months now and I am having a hard time finding the information. Most tutorials I watched are full of mistakes or people using Windows etc ...
Thank you so much!
Juve