I'd personally advise anybody to stay away from micro-earnings, bounty's, gambling, HYIP's, ponzi's, refferal link posting, browser mining,... You either pollute the community, get scammed or earn (allmost) nothing
I'll add cloud mining and even CPU mining to the list. And warn the laptop mining is also a bad idea.
Could you advise me some easy and non-committal ways
You should treat Bitcoin like money / asset. So the best ways to get Bitcoin is to work for it or work for money and exchange/invest into Bitcoin.