Is it normal that i cant insert a single finger into my vagina? it feels like theres a blockage. im a 18 year old virgin so is this normal? i tried several times but i cant physically go further than half a finger?

This might be due to the Hymen. In some people it is more occlusive and firm. Pl see a Gyn for confirmation and advice- depending on his/her findings. Hope you do well

The hymen is a door like structure at the entrance of the vagina. For most, it will have a central opening that allows menstrual flow. If your menses are normal then the hole is big enough for your basic need, It is often the diameter of a pencil, which is smaller than your finger. You can stretch tis out (with pain & bleeding) if you want to pleasure yourself.