Which Option should I choose to reduce rendering Time

I’m new to blender, got into this software a week ago, I don’t know if this is the right place to ask. First of all, I only have ASUS laptop with GPU Geforce 820M, and I’m planning on making animations and good graphics. So here comes to the question I would like to have some advises, should I buy a new computer or if it is possible to purchase a graphic card and install in my laptop with external cable? Which one would be more efficient? And how many GPU can I install to my laptop assuming external GPU can be apply to the laptop. Thank you!

This is the game engine resource forum, any questions about the game engine should be in the game support forum and any questions about blender/ cycles should be in the general support forum.

Blender can run on almost anything.
Here are the official specs:

but again, I can run it on a 10 year old laptop so you shouldn’t have any problems, rendering might just take a while.
Don’t use technology as an excuse not to get started :wink: