Reddit mentions of FINE MARKERS 0.005mm BLACK

First I'll answer your last question, no, there is nothing wrong with not painting or going all out on a model. Like you said, you have only been at this for a few months and it is always best to start small. If you keep at it, who knows, months down the road you may be making your own custom models. That being said, lets see what I can suggest for getting the best out of your model without putting a ton of time (or money) into it. The first few things I would pick up are:

• A hobby knife for getting off the remaining nub, and cutting decals.
  
  http://www.amazon.com/Elmers-XZ3601-X-ACTO-Knife-Cap/dp/B005KRSWM6/ref=sr_1_4?ie=UTF8&qid=1451350392&sr=8-4&keywords=hobby+knife
  
  
• Sanding sticks to level out the nub.
  
  http://www.amazon.com/Squadron-Products-Value-Sanding-Stick/dp/B000CDR5K8/ref=sr_1_2?ie=UTF8&qid=1451350756&sr=8-2&keywords=squadron+tri+grit
  
  
• A marker for panel lining.
  
  http://www.amazon.com/Uni-Pin-Fineliner-0-05mm-Black/dp/B00A7BSEKK/ref=sr_1_fkmr2_2?ie=UTF8&qid=1451351047&sr=8-2-fkmr2&keywords=uni+pin+.5+fine+liner
  
  
• Flat topcoat, I know you said you didn't want to paint, but this is just a quick step to do at the end to make your model look less like a toy.
  
  http://www.amazon.com/Krylon-53530-Acrylic-Interior-Exterior/dp/B001C42OXY/ref=sr_1_1?ie=UTF8&qid=1451351086&sr=8-1&keywords=flat+top+coat
  
  The most important part is have fun with it, and do what you like.

Hi - Thanks so much!

I used unipin - these ones.