Your sentences can carry all the right information and still read as choppy.
Because readers learn like a tree, hanging each new idea on something they know, so a sentence flows only when the familiar part comes first.
Most choppy prose just has the order backwards; put old information first and new last, and use the passive in the rare sentence the active can't fix.
So is flow about better words, or better order?
Order — the words are usually already right.
Lead each sentence with the old, familiar thing and end on the new, so every new idea hooks onto something the reader already holds; where the active voice forces the new thing to the front, convert to the passive to restore the order.
Do it consistently and the sentence-beginnings all link back to one focus, which is what turns a choppy pile into prose that flows.