Floating Effect

Hi and I'm not sure if I am in the right place.

Idea: I want to walk into a field (flat) and start floating into air during storm while being hit by fireballs

Can't seem to find anything on Youtube that's Davinci related, and I sure can use the simplest method that doesn't include green screen.

Thanks in advance,

Coolside

If you don't want to use greenscreen the easiest method will involve learning to actually float, I'm afraid.
If you don't use anything keyable (you can also use different even colored backgrounds but not as well as greenscreens) you will have to resort to masking/rotoscoping. This will *never* be a simple method.