The most suitable way to earn bitcoins is to purchase them with your money(fiat) or other Altcoins you're hodling
Little tasks and skills can't earn you a worthwhile amount,except of course after numerous years, it's best to invest with money you've saved up in fiat currencies
OP talked about earning bitcoins through mining forgetting we've moved on from the past when it was easy to mine,now you'll have to put into considerations the high cost required to mine and actually how many users can afford it.
If it was so easy to earn bitcoins by mining with little costs we'll all be billionaires