Going by your description, it seems that your problems are as follows:
1. You are missing at least one tooth;
2. The upper and lower front teeth are malposed;
3. You seem unhappy with the size/ shape of some of your teeth
4. There is some difficulty in closing your lips fully, probably due to the malposed teeth.
Whether or not these issues can be sorted out with braces, other possible options (e.G. Cosmetic dental procedures, surgery
etc.) and there advantages and drawbacks can and should be discussed with a dentist
after a thorough work up. That will give you an idea of which route might be best suited for you, and help you make an informed decision. Hope this helps.