The risk is you can lost all of your investment. But it is rarely getting loss everything, maybe 3 or 5 times from all of your investment. Of you want to invest because you're new in crypto, better to choose the right coin like bitcoin or ethereum. These good for you, and you can learn little by little next in trading activity.
A good suggestion buddy, since OP was a newbie here in crypto investing those well-known coins like bitcoin and ethereum is the best way to go in investing. These two cryptocurrencies no doubt you have a better profit to invest if you have the patience to wait for at least how many months or a year. After a year experience of investing in crypto and working here in the forum, you have already an idea on how to identify which good project ICO to invest, at that time good for to invest in ICO to lowered the possible risk.