You need to read whitepaper dude, do it slowly when you get used to it, then it won't be so hard anymore. Whitepaper contains many information that you need as a consideration to rate it as worth to invest or not.
Yes, currently I'm reading whitepaper right now to have assurance about the ICO I'm planning to join with. Actually, I admit I'm not often to read the whitepaper, even though I know by reading it you can get the clear idea about the project and to avoid investing unprofitable project.