As per my knowledge to grow faster on steemit, there is only one way you can buy steem power by delegation or by your own. you can even use the Bots at steembottracker.com to upvote your post with a good amount but for free, there is no way to earn in steemit in less period of time. There are chances of you post in trending section if you have a good amount of steem power and you have good reputation otherwise I am working on steemit from last 3 months even after an investment of 500 steem power with delegation I did not get my amount back.
You can use steem blockchain other sources like musing.io, d-live, d-tube, etc which are famous for steem blockchain and may upvote your post with a good amount of steem power. For example you are using musing and if you are working with legit and good quality question and answer then musing team will upvote your post with even 10% then you may get a income of $2+ as it has more than 415000k of steem power so you have to target this kind of whales if you want to earn a good income in less time.
The main thing to focus on is on your blogs, you should make a proper blog which attracts people a lot and upvotes your post regularly and comment and upvotes should be done regularly from your account to a well-reputed account to get the proper amount of upvotes and comment in return. From the first day you may not get a proper value but after some months you may see the result and start earning regularly from steemit.