So I fiddled around a bit more with sketchup until I realised it was not for me. Too many things it didn´t allow me to do, like rendering the image or removing lines (or maybe I was just not figuring it out). In the end I tried to find something called fusion 360 by autodesk and when I found it I realised you could only get a 30 day trial so I looked around a bit more and because I´m a student they gave me a student account so I can use fusion for the next 3 years! Autodesk even gave me some educational files and videos which have been very helpful though I haven´t gone through many of them. In the last lesson I designed part of a robotic arm! How cool is that!
I´m going to stop messing around in these CAD programs and start studying for my last final which is tomorrow xD. Looking forward to learning more about the way these programs work.
Here is a picture of a robotic arm I haven´t finished yet!