I can provide some information about trading/investing in crypto. The first thing that you need to realize before investing in crypto is that prices are very volatile so if prices spike in a direction that doesnt favor you, you shouldnt be too worried because they can easily go up back up just as quick. Also you should know when to sell, some people see prices rise 300% and dont end up selling because they think prices will keep rising. This is what causes people to lose some money because prices end up crashing after such a big rise.
The best way to manage this part is to sell partial quantity like 30 to 50% and rest keep it for some time because many time we noticed that after you sell prices still go high. So if you keep some then you can sell those at a higher price but if prices go down then you got some extra money to buy some later on. I find it this is more useful for both buying and selling all at once.
Since your new to a crypto world so don't jump into some shit coins for faster profit instead go with good coins first and once you gain sufficient experience then you can move to high-risk coins to invest.