You will be dissapointed... you can't mine Steem anymore.
In the early days of Steemit this was possible, but as the miners got the quirks of the algorithm and conquered the mining queue with just 2 or 3 players, the general consensus led to the elimination of the mining entirely.
Anyway ou can get steem in 3 ways:
-> by blogging
-> by buying it on an exchange
-> by supporting the network as a witness
What Is A Witness?
The functional role of a witness is described here, but before jumping to that link, please spend some time here to learn about PoS.
PoS (Proof Of Stake), as opposed to the more popular PoW (Proof of Work) it's the underlying mechanism of the Steemit consensus. If you want to become a witness, you have to own (or have invested in you by other people) a certain amount of Steem. Meaning to have some stake in the network. It’s all described in the white paper, but if you don’t have time to read it, it’s ok, I’l try to make that in plain English below.
How Much Stake Is Needed To Become A Witness?
To be in the top 100 witnesses, you need around 198 million vests invested into you. Which means around 100k Steem. At the current price of Steem, which is around $2, that means around 200k USD.
Good luck to all!