There is no reason to be scared of impermanent loss nowadays. Even if you aren't able to manage risk on your own, there are a lot of useful web portals that might help you doing it. Personally, I suggest taking into account an Impermanent Loss Calculator from one pretty famous crypto influencer whose nickname is defiyield. Link: https://defiyield.info/advanced-impermanent-loss-calculator
Speaking about the impermanent loss in crypto a bit more: it happens when you provide liquidity to a liquidity pool, and the price of your deposited assets changes compared to when you deposited them. The bigger this change is, the more you are exposed to impermanent loss.
In a nutshell, if you are not investing in pools some huge financial volumes - impermanent loss is not something you should really worry about.
P.S. I still suggest you use the calculator I've mentioned above.