Wedding dress

Hi so I’m 19 and I’m engaged and I’ve been looking at wedding dresses online and I found a really beautiful one and then I found out they have it in a wedding shop 5 mins from where I live. I really want to go just to have a look at it but the thing is I’m not getting married for at least 3 years and me and my fiancée have no money and also I’m young so I’m scared that if I go in a wedding dress shop they’ll just ask me to leave and won’t take me seriously and idk those shops just seem so intimating to me and I’ve never been in one so idk how they’ll treat me or react to me. Should I go and have look or?