How to develop in a rather closed French position like this?

Hiii, Beginner here

🤔 WHERE should we develop our [Bishop] & [ knight] here?
I know there isnt THE best square,  But in general where should we put them? in a closed position like this.

• 🤔 [C Bishop - Be3] to reinforce the pawn - and ready to develop the [B knight]?    
  Or simply to leave it there since the diagonal is already open no need to rush?
• 🤔 [F bishop] i think the only good square is E2?
• 🤔 [B knight] finally what abt the B knight?

THANK UUUUUU

As a general rule, you should develop knights first and only then bishops.
The reasons are that a bishop is more active on its initial square than a knight,
and that the best square for a knight is usually more clear than the best square for a bishop.

So first Nb1. Its natural square c3 is blocked by pawn c3. On d2 it blocks the diagonal of Bc1.
So the logical move is Na3, intending Nc2 defending pawn d4, and later possibly Ne3 supporting f4-f5.

Next is Bf1. It needs to move to allow castling O-O to bring the king to safety,
connect the rooks and support f4-f5. It will go to d3 or e2.

Last is Bc1. It will go to d2, will be passive on e3.

Here is an example game:

Very well explained

thank you very much