As a muslim i want to ask everyone how can i get myself save from intrest in future trading

If someone can answer then pls tell me about this i have missed a chance to short $ETHFI when his price is about 1.921 and i know it is going to dump and then i just dump in front of my eyes.I have a 220$ portfolio and i want to short taking 30x leverage for that purpose i even trasfer my funds from spot to my futures wallet but i cant be able to press the button

And now it is 20 to 25./. down

I can make a 1200 to 1500$ by going with that trade for that i m so much sure about

Then after i miss that opportunity i then start investing in spot amd trying to catch the bottom in frustration for although i am wrong but doing this i lose some of my portfolio

Pls tell me if there is any solution

#FutureTarding