I Have a Child With Adhd

My son has recently been diagnosed with ADHD. He is 11 now, we've had issues from a very young age battling to get him the support he needs. He's a very intelligent boy but has a very nasty temper, his outbursts are becoming more and more difficult to manage.

I'm trying to research about the condition, there is so much to take in, I do feel like I'm drowning.