I highly suggest TurboCAD Pro Platinum 2017 as it has many tools to choose from and not as costly as Solid Works. You can also follow along with Textual Creations (Canada) textualcreations.ca and follow along many online tutorials and or purchase tutorials like I did with the Caboose. You will be pleasantly surprised at what you can do. Don Cheke, the owner will be happy to assist.
However, for the Pro Version, since it is graphic oriented, you will need a computer that can handle it. I have some suggestions for you if you wish to go this route.