What about Object Orientation?

State of Affairs

Tcl: incr Tcl, TclOO, snit

Jim: pureTcl oo

None of them is interoperable with the other interpreter.

What would work for Me?

Simple objects are enough. Inheritance is not a topic.

Thingy: a one-liner OO system: https://wiki.tcl-lang.org/page/Thingy%3A+a+one%2Dliner+OO+system