I bought this one as my 1st DD practice lock
This is a fun little lock for beginners. It is not front tension. They are rare tension but can be tension off disc 1 and set the rest 1st. Mine is 7 discs with 3x zero cut. Really need to set 4 discs. You can climb the learning curve pretty quickly.
Zarker J45, pretty cheap on amazon
https://www.amazon.com/ZARKER-J45s-Rust-Preventative-Lock/dp/B07RD4CMY6
The Zarker J45S seemed pretty easy to start out on: https://www.amazon.com/ZARKER-J45s-Rust-Preventative-Lock/dp/B07RD4CMY6/
I believe the Amazon Basics is a good 2nd step: https://www.amazon.com/gp/product/B07SZ73BFF/