New Here. Hoping to learn!

Hello! I'm hoping to get insight and advice for drywall. Amateur DIY'er here hoping to remove wallpaper from my kitchen, then texture walls to match the flow of the living room next to it. The walls in my living room are in great shape so I really don't want to redo the whole living room to match the flow of the kitchen BUT there is a chair rail border of wallpaper that I want to remove and of course the drywall is smooth under that wallpaper border. This is the reason I want to try to match. We are about to start home remodeling and I would like to do as much as I possibly can to save a bit of money plus I love to learn. Any help or advice as to how to get started?
Thank you all in advance!