how to trade the good and right so that we do not lose?
Can anyone advise to me on a trusted site?
For seniors please guidance ...

My recommendation for you is just follow the basics in trading which is "buy low and sell high", be updated all the time and learn how to control you emotions. If have these characteristic and follow the rules in trading then you are now a good trader. In oder to widen your knowledge in this world, you should watch some videos and ask some tips from the expert just like I did when I started in trading.
yes, this is a very good suggestion and if we can buy low and sell high, even if we don't know much about the analysis, we could get a profit and we can survive in the market. we need to know when the time to buy low so we can buy any coin that we want and we can wait for the time to sell high. I still watching some videos on youtube for learning another lesson because I know that I still need more lesson so I can practice more in the market.