Welcome to the new faith. I am sure if they ask you to say the sinner's prayer and say to renounce the devil, sure no problem, to renounce masturbation? I think you will think twice before you convert!
Christianity is very problematic religion, with many "theory" why you cannot masturbate. Depends on your pastor or church, some church I know masturbation is a sin, so cannot be tolerated. For some, masturbation is a concession, but not a license to indulge into it.
My take is this, it is a biological need to release. Good for the prostate health. If your church got issue with your need to masturbate, then go to another church that doesn't have issue with your masturbation.
Some church I recommend you not to go. FCBC is one of them. Masturbation is a abomination, condemn to hell. Very stressful. All conservative churches also, no need to ask. Even mentioning it will let them judge you severely.
If you want to wank and not feel guilty, go New Creation. Prince will never condemn such things. Forgiven, by grace. Best place to sit, enjoy sermon and do nothing also no problem. Attending his church is like eat shit sleep , and it is that natural and not stressful.
Here is the best choice. You want to bonk the same sex and have many partners and orgy, go to Free Community Church, in their website they openly say it is ok but be responsible. If you just follow their framework... as easy as 1 2 3 you know what I mean? You can check them out.
http://www.freecomchurch.org/01-sexualethics.htm
Their position regarding masturbation can be found here
http://www.freecomchurch.org/05-300111.htm
Hope this helps, else you go fuck alien, GMS..