1st of all, I guess you are not learning AutoLISP, but AutoCAD drafting skills. Am I right?
If so, it would be better if you post your questions here next time:
http://forums.autodesk.com/t5/autocad-2013-2014-2015-2016/bd-p/706
Without looking your drawing, the info below is for your reference:
Generally speaking, by setting up drawing scale you need to focus on these factors
1) Test size - 2.5mm on layout as standard in my country.
2) Dimension sizes - Arrowhead size, dimension text size - again, they are to be 2.5mm, you can set up dimension scale by using the system variable "dimscale".
3) Linetype scales - 1.0 by default.
Furthermore, you may need to have a look my post in this link:
http://forums.autodesk.com/t5/drafting-techniques/my-text-is-too-small-how-do-i-increse-the-scale/m-...
Don't be panic with the "massive" info as you just start to learn. Just post here if you have any questions and surely AutoCAD giants in AutoCAD forum will be happy to help.
BTW by setting up layout scale, you can also follow these steps
1) Select the viewport border,
2) Type properties in the command line, then click enter key to change the viewport scale in the "properties" dialog.
HTH
Please mark "Accept as Solution" and "Like" if my reply resolves the issue and it will help when others need helps.
= ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ = ♪ = ♫ =
A circle is the locus of a cursor, starting and ending at the same point on a plane in model space or in layout such that its distance from a given coordinates (X,Y) is always constant.
X² + Y² = C²