Okay... tips on being vocal.

I moan quite loud. But as for me being vocal I quite quiet. I had my husband send me his favorite porn to learn from. And all I hear is “oh my god, fuck, you feel so good, please don’t stop....etc” I say those things but very quiet. I’m so shy.... I don’t want to be. I want to be a complete slut for my husband. Should I just go for it one day? But at the same time I don’t want it to sound forced. We have really good sex according to him. But he asked if I’d try this to make it better. I really want too but I’m so fucking embarrassed and shy. Like I let you eat and stick your dick in my ass WHY IS THIS SO DIFFICULT TO DO. Ugh. Tips on how to get more “relaxed and loose” would be greatly appreciated. TIA!!