for the past few days ive been learning blender and today im trying out sculpting by just using all the tools and trying to make a simple face. However i want to extrude out the neck as i did make a low poly face. At first it woked perfectly when i masked the neck area and used the snake hook tool to extrude it out, however my mask was not how i wanted it to be so i removed it and tried masking again. I mightve pressed some wrong keys trying to remove the mask and when i select the mask tool again it shows a grey circle (not sure if its supposed to be grey or not) but doesnt actually draw the black region over my model. when i restart blender it is still the same. does anyone have a clue on what i might have done wrong here and how i can return it to default ? PS yes the strenght is not set to 0 :)

Happy new year and a thank you in advance!