Start with your finger then move to the spoon.
I’d lower any internal pressure you may feel to spoon feed and let baby do what they can within their own control. Offer food with your fingers or place them on a tray for them to grab theirselves. When I did spoon feed, if my babe didn’t open up I’d assume they’re not hungry and just move on and try later. I made sure to offer food a bit after a nursing session or bottle so they weren’t cranky and also were just getting hungry
My LO hates being spoon fed. We've gone down the finger food route which he seems happier with