setbacks make you learn from your mistake and learn the concept of investing. people fail not due to knowledge but due to emotion and excessive risk taking. they may be right long term but they get wipe out too early if they don't manage risk

there are 2 ways. one is go for growth and disruptive companies. for this, you must understand the company and the industry it is disrupting. usually this companies will lose money first, so no need to care so much about financial metrics coz it will have high future potential.
another way is go for high dividend value stock. for this, look at the p/e ratio, cash flow, revenue, dividend yield and whether the company is stable. usually choose the leaders of its industry. also make sure it is growing, usually will be slow growth, but still must grow. if the company is shrinking in profit, it might be a value trap

I wonder if the borrowing includes leverage. borrowing to trade, it's a disaster waiting to happen. investing needs to start small and gain experience

buy when the price is near support

select a industry that you are passionate in. then do research on the leaders in that industry. don't focus on current conditions, use your imagination to invest in the future