I'd not recommend twitter for your need, usually what I mostly notice is the same thing as you said, political views and trolls.
I follow these:
- Medium : Amazing articles, follow those tags which interests you. Never follow the tags like "Motivation" by mistake, your feed will be overflown with motivating articles.
- Hacker News : Broad news on Tech but amazing. It's the second place any tech news gets updated on the Internet.
- SlashDot : Same as Hackernews but it will also have the content on Gadgets and stuff.
- Reddit : Of course, this the first place to get updated on the Internet. It has good content but I find it overwhelming with opinion threads and too many subreddits.
And also: Product Hunt, Appy Geek(App)
Cheers!