With iOS18, Control Center is configurable by users. Using CJournal v6.2 and above, you can add the "Add Log" or "Add ToDo" buttons right in Control Center, so you can quickly access them to start adding data.
To get started, bring up Control Center by swiping down on the top-right of your screen, then press the + button in the top-left, then choose "Add a Control" at the bottom.
You can then pick which controls you want to add to Control Center, including from Contacts Journal.
Now, getting to the "Add Log" or "Add ToDo" page is just a couple of swipes away from anywhere on your home screen!