Hello
Just to echo Dave, yes a tablet is a must I think.
I would always recommend a Wacom, but they are very expensive and primarily aimed at the Pro market.
Perhaps a Huion might be a cheaper alternative. I think quite a few users here have them. Maybe one of them will chip in here with recomendations…
As for the actual computer get something with as fast a CPU as you can afford as ArtRage is CPU intensive.
Next on the list I would say is as much fast RAM as you can afford.
Next an SSD hard-drive if possible, though not a must have.
As for the GPU, ArtRage doesn’t use it that much. I think it would only really be important if you were using multiple large high definition displays, but that seems an unlikely need for an 11 year old!
Maker Of Replica Macoys
Techie Stuff:
ArtRage 6.1.1 ~ 15" Macbook Pro ~ macOS 10.14.6 ~ 4 Core i7 3.1GHz CPU ~ 16GB RAM ~ Wacom Intuos4 M