Welcome
Take a moment to observe how you sit and hold the ukulele.
If you play without a strap, notice which parts of your body are helping the ukulele to remain balanced.
If you use a strap, adjust the length so that your arms are relaxed when in playing position.
The strap that I use is made by Neotech, https://amzn.to/3HUo4xb
Explore different ways for your left hand to move around the neck and for your right hand to strum or pick the strings.