1 the fastest way you can increase your steem power is by either powering up which is using your sbd for such exchange or use your own money to that..
@maryfavour will give an indepth description of what i meant.
2 no you shouldn't restrict yourself, once in a while leave your comfort zone.. You can make your work more interesting with other topics but don't deviate from your Niche.
Okay, thank you