tips for vintage patterns?

https://www.etsy.com/ca/listing/101385668/vintage-toddlers-jumpsuit-and-bubblesuit?ref=cat_gallery_7&ga_search_query=Simplicity%209290&ga_order=most_relevant&ga_view_type=gallery&ga_ship_to=CA&ga_search_type=all&hc_location=ufi I have a copy of this on order and plan on making the little blue suit. I've never sewn from an older pattern (I started sewing in the late 80s/early 90s), any tips or things to lookout for? I hope that all the things I've learned from sewing Oliver+S patterns will help me here Thanks!