how can i know that my trading strategy works?

i started trading 3 months ago and i lost a lot of money on the start(obv). and i've been backtesting for 3 weeks now bc all i did was lose. and i found a new strategy and i added my own theories to it and i started winning trades. although i didnt trade i was just imagining the trade. i didnt put a trade on the trading app. my question is how many wins/time would it take to know that the strategy that im using works for me and i should continue it. ( also is there something wrong with the market these days? its really hard to find a good setup. )