I used AnySoftKey for a little bit however the glide typing is as ask concurs is clunky, slow and in beta so I’m using gboard.
/e/os 0.17, Samsung, Galaxy S9, SM-G960F
downloaded gboard from /e/apps, put the phone in airplane mode (paranoia), took the following steps
settings>apps & notifications>gboard>data usage>turn off the toggle for “wifi data” and “cellular data” as @Mybass and @ff2u pointed out.
I added…
settings>system>language & input>virtual keyboard>gboard>advanced>turn off the toggle for “share usage statistics”
restarted the phone and turned off airplane mode. Happy typing all.