My main advice is communication. I struggled with even the thought of giving up control at first. My Master and I talked for a solid 6 months before play even happened. We discussed fears, turn ons, goals... Anything and everything. We were able to establish a relationship and trust first. And then when we played, I knew exactly how everything was going to go. And during play, he reassured me constantly that he would keep me safe and made sure I was ok. Talk to the person you plan on submitting to A LOT!! You can't talk too much about it! And don't hold back on anything. Be honest... And you will know when the time is right.