I use satellite.earth and it has changed my nostr experience by an order of magnitude.

You gonto their sote and login with your nostr keys.

You pay a fee sats via lightning.

You can upload any media and copy a link afterwards.

You paste that link into nostr - done!

You could even choose them as your default media server in for example amethyst. Sou you coould directky upload from within the app.

I highly recommend it.