Spot and futures trading both have risks. In the futures you'll need more knowledge compared to the spot but that doesn't mean that spot trading is easy because as others said buy low sell high but without any knowledge you'll lose. Also in the futures even if you have the fundamentals like a learning indicator you still do not have a 100% winning percentage so both of them have risks and only to lessen them with experience and knowledge.
However, trading knowledge is number one and will influence any type of trading. Spot trading looks easy, but in fact spot trading will give panic when they are too high when buying or they are trapped in buying memecoins which end up dumping and not having any price. Futures trading may look easy, but actually when the leverage used is high and the price guess is wrong, then liquidity will come and take all the money at stake.