I like to pace in a circle while quietly thinking, but you could also talk/whisper to yourself instead. I find it easy for my brain to wander if I'm sitting or laying down, so the pacing adds another element to keep the rest of the brain busy. I also tend to talk to myself in the format of if I was recording a Youtube interview/vlog/rant, though I mostly do this to process a situation. Doing that while wandering around the house doing light chores helps my thoughts flow more easily.
I love to go on a walk outside and talk to myself or sing along to music. I walk on the side of a big state road that usually never has other pedestrians on it, so I'm entirely alone and no one can hear me. With headphones on, any cars that pass by will just think I'm on a call. This might not be an option for you, but I thought I'd mention it, because it's one of my favorites. It feels super freeing.
Talking, singing, crying, or just thinking while standing in a shower (I like mine burning hot) is something I do often as well. Sometimes it's nice to just sit on the floor of the shower and let the water fall over you for a bit.
Drawing is good too, but I find that I much prefer traditional over digital when trying to express emotions and/or vent something. It just feels more raw and honest.
I also agree with everyone else who mentioned private accounts. It's something I've done before on Twitter. Just a private account with no followers. You could always use a notes app or document as well, but something about the action of typing something and 'letting it go' (posting it) is very cathartic.
For anger specifically, I bury my face into a pillow to muffle my voice then scream into it. I've also punched pillows before. I know it might seem a little embarrassing or weird at first, but no one's watching you, so who cares? If it works, it works.
I like to put on music I love and dance aimlessly until I tire myself out. Again, no one's watching, so it doesn't matter how bad you are at dancing.
You could always try and put some sort of reminder to journal. An alarm, note in your room or bathroom, or just leave your journal somewhere you will see every day. I honestly only tend to journal when I have something to process. If not much is going on, I'm not gonna write about it. Everybody journals differently.
Wishing you the best of luck with finding something that works for you!