To be honest, Home Alone was pretty much my favourite film as a kid, so I'd love to have a look at what you've written so far.
In terms of experience, I've got a BA in Screenwriting and Producing from the London School of Film, Media, and Performance, where I was personally tutored by a BAFTA award-winning producer (who shared some amazing tips on story development, character arcs, and writing quotable dialogue).
Then I worked as a script reader for a NYC-based production house for a while. So all in all I've read, reviewed, reworked, and packaged more screenplays than I can count, and having worked alongside the studio heads, I have a good sense for what kind of stuff never gets green lit (or even read past page 10). I know what changes a writer needs to make to turn an unwanted story into one that secures funding.
If you decide you want to discuss this further, when it comes to feedback I can't promise to tell you what you want to hear. But I will be honest about your work and do my best to leave you with work you'll be proud of.