to know what to do and when

This is a common question among those who are starting to invest: should I hold on to an asset at a loss and wait for it to reverse, or should I sell it right away and move on to another opportunity?
The answer is: it depends. It depends on your goals with that asset.
Did you buy with the long term in mind?
If the asset has good fundamentals and you acquired it with a long-term vision, it is worth holding.
The market is volatile in the short term, with ups and downs. However, over time, solid assets tend to appreciate in value. The important thing is that the final balance is positive in the long term, reflecting a growth trajectory.