I'd definitely be interested in writing for you seeing that you seem willing to pay fair. As for topics... that'd be Brother Bitcoin's choosing as 1) I love all things crypto, 2) wrote a handy guide myself targeted at BTC nooBs (which you're more than welcome to include within your BTC resources) and 3) simply love crypto projects geared at lowering the barrier for the "technically challenged".
I highly encourage you to check out my writing portfolio:
http://altcoinwarrior.com/about-altcoinwarrior/
Feel free to PM me if you'd be interested in partnering up on your endeavour!