Ask HN: Advice with systems design

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I am a junior programmer and would like to implement a couple personal projects, would love to get advice on some architectural aspects. Is there a place on the internet where experienced software engineers are willing to share advice on design/architecture matters? I'm not sure if HN is one of those places, but if it is, here is an example of the kind of questions I have: How do I bootstrap a web and Java application that keeps track of a number of parameters that each accumulate values over time, then I need to display graphs with those values and most importantly, determine correlations between those parameters. I'd love to re-use some existent Java frameworks for all this, but especially the correlation part. Thank you!