Welcome to the Forum.
In the General Discussion area, there is a sub-forum titled Have You
inherited Some Stamps? Start Here.
A few images to give a flavor of what you have are useful (practically necessary); the pictures can be supplemented with some further descriptions.
The more you can show, the more accurate the members can be in giving you some idea of what you have. Within reason. Start with a few pictures and let it go from there.
Note that no one can offer to buy your stamps, and you cannot offer to sell your stamps through the Forum, until you've made fifty "quality" posts. That isn't the main point of the Forum, anyway. People can give you an idea of what you have, and ideas of what you might do with them. Also keep in mind that you aren't getting an appraisal of your stamps. You're getting some quick (and free) takes on what you're able to show.