Debian right for my use?

[Cadman <cadgraf@hotmail.com>]

Greetings

I need help determining whether Debian OS is the right OS for my needs.

I am a Draftsman working from home due to physical handicaps.  I use 
graphic and RAM memory intensive 3D CAD software in Windows 7.  My W7 OS 
is operating poorly and is expensive to replace.

If Linux is right for me; I need to replace it with a 1. Very stable, 2. 
With least amount of configuring and 3. User Friendly Linux OS.

A friend suggested that I replace Windows 7 with Ubuntu Trusty 14.04, 
which I did.  It worked fine until I installed my 3D CAD software within 
Virtual Box.  Since then Ubuntu and the software crashes often.  It even 
reboots instead of turning the screen black when the 10 minute screen 
saver feature operates.

My PC System Info is:

BioStar A780L3C Motherboard
AMD Athlon(tm) II X3 450 Processor × 3   64 Bit
8 Gig RAM Memory
150 Gig Hard Drive

Please respond
Thank You Very Much

Dave