I dont have a powerful pc and I dont have money to buy one can I be CG Artist?

Well dont worry its not about your pc I had 450MB 64 MB of Ram 8MB VGA can you imagine that 8 MB and I did ok for sure it is the harder way and let me put it is this way you have bicycle and Mercedes car both will go From A to B but in the Mercedes You will Arrive Easier and Faster bicycle will make it too but you will need some Effort with that but the Important thing Keep Trying never Give Up any 3d package has a lot of features to boost the performance and if you know how you can tweak your performance to the best you can almost do any thing but as I said It will need most of your effort may god help you with the render time .