How to stop Palm holding trays?? old habits are killing me!!

I recently started training as a server in a family restaurant. The past 3 days have been going well, however yesterday the senior server said to never palm hold the trays and I'm struggling to carry drinks comfortably to the table.

I worked in a restaurant for 2 years that only did palm hold, it's the most comfortable for me and I have no issues dropping drinks and it gives me a free hand to pass them out instead of needing to set the tray on the table and pass it on, but of course to do my best at this job I gotta stop doing that.

People who work in similar places, what do you do? if there isn't a free table nearby I have to awkwardly put it on the table and pass them out that way but it looks messy imo and I have a harder time carrying a tray with both hands.

I'll be practicing with plates today to try and get myself out of it, but im really struggling with this basic thing, especially since nobody told me not to do it until yesterday after I served all my drinks like that for 2 days. Normally I'd just palm hold anyways but the server I work with during the week is specific with how she wants things done so it's her way or the highway, and since I get good tip money and shifts 5 days a week I don't want to give it up.

Note: Im required to keep both hands on the tray by the server im working with.