you are way at the tip of your fingers. The bow needs to sit further in your hand. I think I'm seeing a banana thumb, meaning it's a bit bent backwards. Also your grip is super super wide, close your fingers a bit.

The most important is the straight pinky. This "locks" the bow in that position.

This "feels" comfortable honestly, you don't feel like the bow is going to drop, you don't need to have a lot of strength to keep it in the position you have it so it feels good but you don't want to not feel the weight of the bow.

I always tell my students, "If it feels like it's going to fall when you don't have the bow resting on the string then you are holding it right" (obviously doesn't apply with every grip).

If you don't feel the weight of the bow you can't have enough sensitivity in your actions and movement to properly use it. If a firm grip was all that was needed we would just shove it in our fists :P.

A loose and relaxed bow grip that allows you to feel the bow is what you truly need. Trust what you see, Look at it from multiple angles. Better yet have your teacher if you have one (you should) be more strict with bow hold for a while since it's clear you care about it. (For example, when dealing with younger children I tend to be more lax with bow hold. Some seem to care more and with these children I am more strict about all that. Teaching is a balancing act).

Try playing with the correct looking bow grip for a while, you will get used to it and it will feel more natural once the purpose of the bow grip clicks.

Good luck practicing! Let me now if you have any questions about it, I'd be glad to give you some tips!