Wow, for a newbie, you already know so much.
This introductory post is all so detailed.
Now, to answer your questions.....
Someone once told me Steemit is difficult is that true? Or what can you say about this?
Well, I'd say, Steemit is what you want it to be. If you think it is difficult, then it will be so for you.
How can I earn more upvote?
There are some tags that when used, could get you more upvote. Tags like #wafrica, #girlsfoundation, #steemitcentral, #steemjet, #steemstem, #bigwaves, #nigeria and a host of many others alike. You simply need to put up great contents to be recognised by these accounts.
How will I get my work noticed by the steem community
Simply create astonishing contents and use the right tags, you'll most definitely be seen by them.