Welcome to Steem and thank you for your service! Steem has a great community, and there is so much to learn its amazing. If you havent read the FAQ yet you should it is very helpful. https://steemit.com/faq.html
If you are considering investing in steem I would read this article first: https://steemit.com/steem/@jerrybanfield/top-10-reasons-to-buy-and-hold-steem
I converted the Steem Whitepaper into audio format if you prefer audio over reading, you can find it at https://steemit.com/steem/@meatspoon/steem-whitepaper-in-audio-format-feel-free-to-download
Participating here can be frustrating at times though. Just be patient and hang in there. Longevity is the key to success. I haven't been around very long but have done a lot of research about how Steem works and how to use it. If you have any questions you can ask in one of my posts, even if it's off-topic. Or you can join my public Kik group #steemitvote4vote for a live discussion with me.
Have fun and steem on!
Thank you