I’m so glad that you found this helpful and encouraging!
Start when you are ready and excited about it. I wouldn’t even say that the necessary goal should be 2000+ kanji either.
I thought about something for a while and maybe I’m wrong but "if you are able to read kanji… the longer you wait until you start practising writing, the easier it is going to be."
The more comfortable you are reading and the more exposure you get to the language, the easier it will be for you to connect the written kanji to the words you already aquired. I don’t know how to explain it but it makes sense right?
For example:
If you are dead sure that the word “green” is written using the kanji 緑, then you pretty much just have to learn the stroke order and that’s it + an optional mnemonic if you feel like it.
Since you are able to read and have had experience encountering multiple similar looking kanji, you know that 緑 looks similar to 縁. Instead of the feeling of “oh no they look so similar, how will I remember?” I instead experienced the feeling of “finally, I can see the difference so clearly now.”
I guess my point is, learning how to write kanji can always wait and by doing so it will get easier instead of harder so that’s a nice thought for all of you procrastinators out there, right? 
