At first i bought new new new all the time. But after a while, L was only wearing a few things once or twice before she outgrew them (she was a quick grower!) I got a lot of things from my brother and my sister in law but I only kept the clothes that were in good condition and didn’t look too worn.
The first outfits she had were new, but now as some clothes can get quite stained I go to NCT nearly new sales and buy from there, but I only buy clothes in good condition with no stains or clothes that looked like they have been washed a couple of times.
For your first baby I think everyone is a bit funny about buying 2nd hand or using hand me downs, buy whatever you want and then make your own decision. If it is not something you would wear in that condition, would you put it on your baby? That’s how I look at things now xx