Can I practise Arabic typing without an Arabic keyboard?
Yes, and most people here do. Your normal keyboard is remapped through the standard Arabic 101 layout while you type: H sends ا, F sends ب, V sends ر. The onscreen keyboard shows you which key you're meant to be reaching for, and it fades out of your attention within a session or two. Once the layout starts to feel automatic, add the real one to your machine so your fingers work off position rather than off a picture.
Do I have to type the harakat?
No. The words are shown fully diacritized because that's how you learn to read them, but you only ever type the base letters. Fatha, kasra and the rest fill themselves in as you go. That matches life outside this site, where almost nothing is written with the marks on. Hamza is the exception, and it's strict: ا, أ, إ and آ are four different keys and only the right one advances you.
Where should I start if I can only just read Arabic?
Lesson 01, the alphabet set. There's nothing to translate in it, so your whole attention can sit on finding keys, and you get through the whole layout in a few sittings. After that the beginner level is the safest place to be: every word in it is four letters or shorter, which is short enough to hold in your head while you're hunting.
How long before typing Arabic stops feeling slow?
The hunting phase is short. Ten minutes a day for a fortnight is usually enough to stop looking at the keyboard for the common letters, because seven of the ones you use most (ا ل ي ب ن ت م) sit on the home row. Speed is the slower half. Expect a few months before your Arabic pace comes anywhere near your English pace, and expect that gap to be normal rather than a sign you're doing it wrong.
Should I practise every day or in long sessions?
Little and often wins, by a wide margin. A session here is eight words and takes about two minutes, so two of those before you close your laptop will do more for you than an hour on a Sunday. What you're building is a motor habit, and motor habits respond to frequency.
What is the difference between this and the typing test?
Practice is untimed and repeats what you get wrong. The typing test is a fixed minute with a WPM and an accuracy score at the end of it, which is useful for tracking but not for learning. Practise here, then take the test every week or two to see whether the number has moved.
Does it work on a phone?
Yes. Tap the word card and your phone's own Arabic keyboard comes up, so you practise on the layout you'll actually message people with. If you haven't added Arabic to your phone yet, the iPhone and Android setup guides take about a minute each.
Is any of this free?
All of it. No account, no trial, nothing to install. Your session runs in the browser and nothing about it leaves your machine.