APS-C lenses makes more sense
Back in the days, If you wanted a great lens for your aps-c camera you pretty much had to buy a full frame lens.
Today there's plenty of great aps-c lenses on the market. They're still more affordable and usually makes more sense in terms of field of view and versatility compared to the more popular primes and standard zooms for full frame cameras.
So unless you're dead sure you'll actually will upgrade within a reasonable time - you migh be struggling to get things in frame ;)
My favorite lenses for aps-c
ZOOM
https://amzn.to/3oOgQHP
https://amzn.to/3oOgQHP
Primes
https://amzn.to/3MSfeEM
https://amzn.to/3MSfeEM