you can try your luck with:

 - https://coinmarketcal.com/en/ : BEST ONE
 - https://coinscalendar.com/
 - https://coindar.org/
 - https://www.coinevents.co/hard-fork/

I used them in the past to make some profits, they are good sources of information but the market is volatile which makes the chances of success of good projects slim and therefore developers will think several times before launching advertising campaigns.

The best thing you can do is buy bitcoin or save cash to buy bitcoin instead of wasting your time with these projects.