Good! We can always use more writers putting decent content out there! I hope you do :)
I find here in tumblr is an excellent place to find captionable material and if you need somewhere to start you can try my own personal porn-for-future-stories blog www.thwts4tw1stng.tumblr.com
Happy hunting! The only other advice I can give you is trust your gut and don’t be too critical on yourself…. Just write lots and put it all out there and don’t worry about notes or whether something is subjectively “good”. Message me when you’ve done something cool and I might share it :)