You can refer some website review and rating ico if you dont have experience. I ussually refer website:
- trackico
- icorating
- icobench
You can over view about ICO from their. Then you can check detail as: View white paper, join telegroup and ask them about project, view team profile...
I do not fully trust them, I still doubt whether they are giving a correct review. after some time ago one investor said that the ICO rating could be sold by the ICO Team. I did not say the details of this information to maintain their privacy.