Loud cracking noise after installing new chain
My guess is you have some tight links that are making noise as they go over the sprocket. Those can probably be fixed easily.

See this Park Tool video. Tight links are addressed at about 10:35. 

It might be that you did not join the chain links properly. What method was used to join the chain? A master link or rivet?

You can also see the chain tensioning advice in the Park video to check if that is the cause.