As far as the projects, you could try simpler ideas like:
A. Secret Word
Form with a single Input (Can be single line input or an entire textarea) can ask for input from user (ie; Describe Yourself) and have a routine to search the text for a secret word (ie; 'developer' or 'married' or whatever) and, if found, display an Alert box with a message as a result.
BTW you could use this routine for future apps you might create as well. This should be quite simple to do. If you get stuck, or have questions, search engines are a great place to start your research. You may wish to add 'vb.net' to the search query.
B. App Launcher
To use for yourself, this could be a form full of buttons that have your most used applications hooked to them. (ie; Browser, VB, Notepad++, etcetera) This may be useful for bringing up everything you need for a specific purpose.
For example, for development, you can have a 'launch panel/form/app' to load in a search engine in a browser, editors like notepad++, DaniWeb website in a browser, code references and more.
Again, these are off the top of my skull, but B is the easiest since it only needs 1 or 2 specific lines of code to perform, only repeated for each button you create.
Image Processing is much more difficult, depending on what your goal is with it. I would suggest working with the 1st idea (#1) as an easier project actually. It all depends on what you know and have learned, and since I don't know what that would entail, I'm hard pressed to suggest anything 'do-able' according to your current abilities/knowledge. Keep in mind I am also a "n00b", but in my 1st semester I learned all I need to know to handle Project #1 as well as all the others I had mentioned. "Easy" is totally reliant on "Ability" and "knowledge". It may be easy to throw a softball, but not for an amputee or an autistic person, for example. Hope something here helps! If not, perhaps perusing around and doing searches for code snippets might spark an idea. Good luck!!
If your wanting to do image processing, make a program that counts how many blue pixels are in an image, or how many other colors are in an image. Or a find and replace pixels based on their RGB value.
there r many topics in vb.net such as:
1.online test system(a s/w for any kind of exam like entrance,apti test based on timer)
2.pathology laboratory system(s/w that handles d laboratory records n generates d reports)
3.school management system
4.library management system
5.crime management system
6.hospital management system
7.payroll management system
8.bank management system
9.automatic timetable generator for classes