First off, you’re not bothering anybody. This is exactly what the site is for. 
Secondly, if you have been diagnosed with ADHD and a Learning Disability, then you are not “Slow”. Slow in this context refers to someone with an intellectual disability. Someone with a Learning Disability is of average or above average intelligence who has specific weaknesses. Someone who is “Slow” is of less than average intelligence. (Don’t mind me, I’m teacher with Special Ed training.)
Thirdly, no, you are not the only person with reading, writing, grammar and spelling problems here. A lot of people with ADHD also have learning disabilities as well. Or even if they don’t, their issues with attention interfered with them learning those subjects, or makes it more difficult for them to apply what they know to their reading and writing.
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