I'm also living with strict parents but unfortunately, in my case, the only way I can think of ending myself is to run away as far as possible and drown myself at night time but of course that's extremely scary to do and I probably don't have the courage to do it. In my case, I do have money due to student finance for university but I can't really use it to buy SN since the package would just get intercepted by my parents anyway (plus my mum sometimes checks my bank account). I'm sorry for your suffering and I know how difficult it feels to be trapped in existence due to strict parents.
I have quite strict parents, But im going for the SN method. The way for me was to not buy anything myself, but through other people. I store it in a place that they never check, which is my headphones box, lmfao.
What exactly do you mean by this?
Also, if anybody here ever finds the answer to OP's question, please let me know. I really want to get out of here but I don't know how to. In my case, independence isn't an option