In each area there are mosques designated for kids to learn Quraan and Tajweed. Alot of times, the Imam spare time for adults as well. You may try it in your area.

Besides, you may also talk to the Muazzin of the nearby mosque and he would be able to help you as well.

There are online courses and classes as well. But tajweed is something best learned in person.

All the best.