I think you'll find that most of us here dress our babies. Not just the girls, the boys wear clothes too

My babies love their clothes. Especially when it's cold outside. Mine have pjs and bath robes too (as a lot of others here do too)
You mentioned that you haven't purchased any becuase of the comments you've heard others make...if you like something, want it and can afford it, then you should get it. Don't live your life worrying about what other people think. It's your life and your money. Stand up for yourself.
As for where I get my clothes...well, I get them everywhere. My favorite place is right here on YT! If you haven't seen it there's a section on items for sale and YTers stores.
But I gotten them from on line stores, ebay, pet stores, Walmart, Target, the list goes on and on. Heck even the Harley D store has them

let someone say a smart comment to a biker and see what happens
Hope that helps. Here's a photo of my Bijou in her onesie we got yesterday.
Can't wait to see photos of your baby in some clothes

And yes, she has a stroller too. They are great for taking them shopping in clothing type of store with you. Welcome to YT!!!