Hi!
I'm struggling with the same thing for months, building my approval rate slooooowly so maybe in the future I get better paid HITs. Also make sure to know if you're eligible for payout or just transfer via amazon giftcard balance. I didn't know about that, but found a way around it somehow.
Just try to get as many quals as possible and keep an eye out for good paying HITs. I'm also relatively new so I don't know much more to tell you.