Learning any language on is possible. We need someone who can teach us the basics of any language and then practice the same and its done. Same is the case with Arabic language and Quranic Arabic. One can learn it online and it will be more affective.
There are many reasons why online learning is more afective and purposeful.
Firstly, you get a lot on time saving. You have not to drive for it. You can just learn it on computer ot your tab. Just be online at your class time and start learning Quran with your Quran teacher.
Secondly, the classes are one on one that means you can get individual attention for the lessons you are taking for Quran learning and reading. Then you are more focused on your learning and improvement as well.
Thirdly, its affordable and cheap as there are many online Quran teaching institutes and offering the classes online. There is compitetion as well and you can try a free trial session as well to see if this is suitable for you or your kids.
Lastly, you can take classes at your desired time and days. You can request to learn Quran online with Tajweed at any time you need to learn. If you are a busy person then online Quran learning is the best option. Best of luck.