Parkas

Dumb question coming. I just got a swim parka. I had never had a use for one since I had been swimming at gyms where I go directly into a warm locker room and shower. Now I am swimming with a Masters club outside with no lockers (head directly home). This is where the Parka comes in. First use this morning. Couple issues. I put my essentials in the pockets and skipped a bag. Kinda bulky and uncomfortable. I didnâ€t wear any clothes over my suit. Just the parka. That didnâ€t feel right either. What is the best way to do all this? I am not asking how to wear a jacket. I am asking how to best use a specialized piece of swimming equipment.🤣