Yes, you will probably shop with your guardians but if you are able to have your friends there, this will help give advice, share what they are wearing and might even help encourage you to step out of your comfort zone
During my subscription period, I found the chat feature to be very helpful
No velcro
Its easy to throw one on to elevate an outfit and to add a little color
I like to use a ruffling/gathering foot (affiliate link) to gather the tulle quickly if you dont have one, you can set your machine to a long, loose stitch length and then pull the bobbin threads when youre done to gather the tulle by hand
In reality, smart layering, proper lining, and practical accessories often provide enough comfort without adding unnecessary weight