Well, it sounds like your dad already knows. I think he may be patient, but if your father is a firm believer he may discipline you by the ''rod" to save you from the depths of He$$. I purposely put in the $ sign, as it is the sign to punish or scorn through chaos and punishment. Certainly, the 'saved' makes the world scared. I smell the spirit of rebellion, already. The spirit of rebellion is witchcraft. Six for the perfection of the self, and seven for the enlightenment by divinity. You think it gets bad when you do one or two black-magick spells. Well, let me tell you, it only gets worse as you grow older.
Well you're a heathen (by heart), in a seemingly Christian/Gentile house hold, and that is adding some leaven to the whole dough. A little bit of leaven leavens the whole bread, and it percolates with everyone else's spirituality. By what you said that your father has mentioned, and this is what I think it comes down to. . . he, your father, is responsible for what goes on in his house hold, because the man is generally considered headship, in this case. After all, it is implied that the man is the stronger vessel. From a Christian's doctrine, there is both a judgement for the lost and the saved. I think what it's going to come down to is that your father, your dad, will eventually make a choice. By what your father believes, he will basically say that you're bondage, and he may pray about the hold that the devil has on you, ministering here and there.
The choice, if he isn't a sleepy Christian, would be that he would destroy all your occult implements, but I think he is patient with you. He is your father, so he will show his love for you with long-suffering, but if he truly loves you, he will eventually discipline you. Meaning, I think he will set the 'record' straight.
I think it would be best just to let what you want to say, out. Does fear set in and does your heart pound, when any sense of your identity with the craft is at stake? If that is true, I think it means that you are afraid, because it's like, "I am afraid that they will persecute me, judge me and leave me out to dry." And you know what? It goes on. Well, I think you love what you do, but it's the devil holding you back. The "devil." Lol! Shame holds us back, and I think you got to be able to river dance about anything that you have passion for. I wouldn't suppress myself. I would take this on with an iron fist, and if my words aren't personified enough, I don't know what is. You can tell I take pathological-narsacistic-bureaucratic liars real well. Ring the church bell on this one, with one big Abraham Lincoln. Is it always best to tell the truth?
Ironically, then if the spirit of rebellion is witchcraft; look where you're at. Something is going to have to give. Fruition is coming. Call it a paradigm shift. It's your choice.