How to stop my fear of speaking up! ?

i have a fear of speaking up. and it really bothers my life. i hate feeling confused by not saying or ask what i want to. and i know tha silence will get me nowhere in life. so i just want this to be gone. and also i need to ask my auntie about something that i need. i live with her not my parents. and i need to ask her about like if she knows any cream that i can put on my face to treat my sunspot. its' embarrased because i dont like about my looks with others. and i really need to ask her. so what would be a good time or place to ask . i mean i cant just go up to her and say "do u know any cream that i put on.." please give me some advice. and pleaseeeeeee i reallyyyyy need your help.