What Headphones Shoul I buy?

Hi guys! I just wanted to ask you for some recommendations on headphones for mixing and production, I was looking for the best possible option specifically in terms of brands and models in of mid-range or mid-high range due to budget limitations.

The only thing I know about the subject is that the most "flat" sound possible is sought so that it respects the fidelity of the audio both when listening to tracks from other artists and when creating your own. I also understand that the most professional option is to use speakers, but due to the place where I produce and since I am at a fairly intermediate level, I preferred to go for the headphones option.

Imagine that until now I was using simple Samsung earphones that used to come with old Galaxy devices, I used to get them separately at a good price, and to my inexperienced ear, the fact that they didn't have bass boost and that they were loud compared to other products was enough for me, I was literally saving this question for the day I couldn't get that model anymore, the day that finally arrived (they were the round black ones that came before the white ones that for some reason had fewer holes to let out the volume completely).

I would appreciate any kind of guide and recommendation!!!!