Math logic/reasoning self-education with embedded deductive tool

The https://prooftoys.org/ website presents logic and basic mathematics of the real numbers. It includes a practical embedded deductive system for learners whose background may be just ordinary high school mathematics. The site includes:

1. An introduction to logic through pictures, basically interactive Venn diagrams with explanation. This is a point of view on propositional calculus.

2. A brief presentation of the rules of the logic of "simple type theory" at a raw beginner's level.

3. A number of completely rigorous simple proofs, some in pure logic, and some about real numbers, starting from the classic "complete ordered field" axioms that define the behavior of real numbers. The proofs are all done by computer from the ground up using the logic and axioms (with a handful of gaps). The proofs are all available for reading online, down to any level of detail, interactively, and at the reader's discretion.

4. A web-based tool that lets you build and edit your own proofs.

I am seeking user input on the site, and will gladly answer all kinds of questions as far as I am able.