learn how to use a woven wrap instead
with that attitude and direct delivery you’ll go far on STW ;-)
IME at 9 months you could go straight to a papoose style carrier. At around 9 months we were stopping using the soft sling and using an Ergobaby 360 a lot more. Style of carry depended on whether we wanted little one to fall asleep, hope long the walk would be and how your back was feeling (carrying on front less good for your back).
Going up an a framed carrier means your little one will see a lot more than a soft carrier on the back. Also lots of options for carrying stuff and adding wind/rain shelters.
We didn’t like a Deuter Kid comfort (and old model). The shoulder straps were very uncomfortable, it didn’t strap the little one in very securely at all and the sun shade didn’t stow internally, so never got used. Replaced it with an Osprey Poco, which addresses all these points but still don’t find the hip belt/pads very comfy.