Tajweed and its importance can only be studied with a teacher. Online Quran Teachers are the best at teaching Quran with tajweed.
The same rules can be studied independently, but their correct use can only be achieved by hearing, chanting, and being corrected by a qualified Quran teacher.
In the days of the Prophet (Peace Be Upon Him), there was no need to study tajweed because they spoke with tajweed.
It was natural for them to speak with tajweed. Now, more than 14 centuries later, regional Arabic has radically changed from the classical Arabic with which the Quran was revealed, and Arabs have to study tajweed, in precisely the same way as non-Arabs.
If you want to learn Quran with Tajweed online, but you do not know where to start. We are here for you.
The basic is to find the best online Quran teacher i.e., Online Quran Teachers who will listen to you and point out the mistakes, and help you to practice the correction. You have to learn the Arabic lyrics and vowels too.