How do you keep up with new advancements or tutorials for newer technologies that you want to learn? Is there a newsletter or website to find out newest tutorials available.
Depends on the technology in question. Hacker News itself is good at a general level, but then you have topic-specific sub-Reddits, topic-specific bookmark sites (e.g. EchoJS), and newsletters like my own <a href="https://javascriptweekly.com/" rel="nofollow">https://javascriptweekly.com/</a> <a href="https://golangweekly.com/" rel="nofollow">https://golangweekly.com/</a> or <a href="https://dbweekly.com/" rel="nofollow">https://dbweekly.com/</a> for example.
Its much easier to keep up with good contributors in that area. Example, to keep up with great code releases, simply follow top open source contributors on github to get notified whenever they star a repo.