I believe there's a certain number of times a day you can vote. I'm not sure how all the math works out on it, but i did find a useful tool for knowing how low i am on voting power. Steemworld.org
You put in your username and it will show you all kinds of data about your account, even adds upcoming author rewards for you. It doesn't need your password or anything, just compiles all the public info for you.
My kids are about to wake up, but when i come back on here later I'll link you to some tutorials and stuff that's helped me. I haven't made a whole lot either, but I'll try to help you if I can. 😀