im new to fish but having been around to forums and having fish myself now for 4 months i'd say,steer clear of neons on a young tank and stock it with harlequin rasbora instead, my 90L is stocked with 5 harlequins and 5 danios,with 2 platys and 1 shrimp
After ive given the fish away and moved house im gonna stock the tank with 7 harlequins,4 platys,some small plecs and 6 shrimp i reckon