Got a good position, what's the plan?

@tpr no nf3 is better because if 4. e4: , nf6 5.nc3 ,e5! in theory, black has equalized
you play nf3 to prevent e5 from black then play e4 as white

@dinoko after 4 e4! Nf6 5 Nc3 e5 6 Nf3 as well as 6 d5 offer white an advantage: more influence over the center, better development.

@tpr after trading queens the development advantage doesnt mean that much and black will have a permanent 3/2 advantage in the queenside but idc what you wanna play trading queens that early doesnt give white a real advantage

Yes it does. Trading queens does not nullify an advantage in the center or in development.
Example; lichess.org/dMnbz8iD#10
Besides, white can also play 6 d5.

@tpr while there's certainly a good chance that after 4.e4 white still has an advantage, you haven't substantiated your statement that it's better than 4.Nf3, which avoids this line which is under discussion. In GM Boris Avrukh's book he affords 4.Nf3 an exclamation mark and says 4.e4 Nf6 5.Nc3 e5 "gives black counterplay".

After 6... Bb4, Black has not developed his queen side, and has no pieces on the king side. You may bet that he is going to castle king side. The natural continuation for White is to prepare an attack on the king side, so i think that 7. Bd3, targeting the future position of the Black king, is a bit better than 7. Be2. I guess Black will not be able to parry all the threats.