Hi Craig,
It is often a problem with these kinds of ‘heavy visuals’ software. Have a look at this: https://www.blender.org/download/requirements/
(You might observe that there is some 3D software around, that is a lot faster than Blender, but look at their minimal requirements!)
I must say, that working with a computer that is on the low end spectrum, can even be helpful in learning to, how do I say this: ‘save resources’.
