Not that I’m particularly good at this myself… but it is our mission at yeekatee[^1] to help people manage their finances and invest wisely, in the long term.
Right now we offer a rather good portfolio aggregation, either via manual or automated syncing (read scraping… alas, the state of financial technology…). From basic to rather advanced figures, a lot of explanations. Market data, news, and dividends.
And finally a social network to discuss and learn with like minded folks. We wanted to do a proper Show HN in a few days actually, but I thought I’d leave it here as you could find it useful!
[^1]: https://yeekatee.com/