I’ve been wearing one for nearly 20 years now and they do take some getting used to. The inner ear bones in my left ear are fused together (other ear is fine!).
You’ll eventually get to the stage where not having it in feels weird, not the other way round.
My only bit of advice is don’t become a ‘casual’ user and pop them in for certain occasions. Mine goes in when I get dressed in a morning and comes out when I go to bed. Make it part of your routine.
Mine is a Signia provided by Specsavers NHS service. I find this more convenient.
For a first time user you may need to go back and get the sound adjusted, but give it a week or two.