If I do, can I choose the target to be all on the player or do the new targets have to be under same targeting rules?
Yes, and no.
For example, if the original spell targeted a flying creature and a player, the copy must also target a flying creature and a player.
Or in the example you gave, the copy will also have to target a flying creature, a non-flying creature and a player.
Yes, you can redirect all those targets. Wild Ricochet says "choose new targets" (plural), not "choose a new target" (singular).
No, you can't choose to target a player with all three effects. You still have to follow the targeting rules on the card, the same way the original caster had to - Wild Ricochet doesn't make you exempt to them.