@scget5,
What do your parents think of you attending a Presbyterian church on Sunday evenings? Have they asked you to stop?
Have you spoken to the elders of the Presbyterian church? They're likely to be able to give better practical advice than a bunch of strangers on the internet. I would assume they know your situation more intimately.
I myself would, first of all, advise you to stay under your parents' roof. If your parents are OK with you attending the Presbyterian church, then that's a blessing. I would push back against any suggestion to leave home and set up with another family, as, based on what you've posted, the situation does not merit that kind of reaction. Taking such measures is bound to drive a wedge between yourself and your parents that could last a lifetime. Gentle speech and a gracious manner, meanwhile, can set an attractive example
My dad kicked me out when I was 21 (not principally over religious issues). While I was by then independent, I have had a bad relationship with my parents and my siblings since then. I would earnestly say that if you have a generally good relationship with your parents, praise the Lord! Don't throw that away. It's a lot to lose.
Be careful not to do anything to antagonize your parents over this. Be careful in your words, how you speak of their church. Be careful in your actions, because you are your parents' window into Reformed religion.
As far as possible, live at peace with everyone (Rom. 12:18).
And get on your knees and pray.