I think you're going about the wrong way if you're reaching to plugin for every simple thing in vim. Granted, I will say that vim has steep learning curve, it kinda gives you the power to do your _own_ way which is probably why you're seeing people do their own way. Also, you sort-of have to shift your mindset to embrace unix/shell as your IDE. But definitely reach out to other tools if it's not your cup of tea. Like many others have said, if you're trying to force it into something it's not then you're going to have a miserable time.

As for your e.g. it would be a simple autocommand to run black that's installed in your machine on buffer write event in your neo/vimscript.

`autocmd BufWritePost *.py !black %`