https://icodrops.com/
https://icorating.com/
Then look at the people number of telegram groups, check the white papers and technical routes on the ICO project's website, and you'll find out some useful information.
Problem with the telegram groups is that they can deceive a large number of participants with the presentation of the false value of the desireable ICO. The best advice is to gain more knowledge about the cryptos because many percents of the people have their own intentions that can result only in the profit gain ( but only for them). ICO sites are often presenting the project as it is presented in the whitepaper and in the thorough plan that the team has.
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These days there are many scammy projects that are usually disappearing in the end with the investor's money. Listen to your intuition. By the time you will gain more knowledge that will be of some use to you when you will watch the charts and calculate the possible success of the certain ICO. Also, try to look at the market cap value because it is determining the final value of the coin after it is released. Try to find the middle value and also try to analyze the current demand for that project because demand is defining the popularity of the designated ICO.