[ENH] Consider improve this repo with more than just a crash course

### Is there an existing issue for this?

- [X] I have searched the existing issues

### New feature

```markdown
For example:

- datalad 101
- troubleshooting
- CPP x datalad cookbook (just the essentials as we use it)

The section will be separate md files or part of the cpp_labguide here https://github.com/cpp-lln-lab/CPP_LabGuide
```


### Unclear documentation

_No response_