Science Buddies: "Ask an Expert"

Hello, I'm Ishan. I decided to make a Google Science Fair project. My idea was to create a 3D "holographic" projector. Although a prototype is already present, it is unsafe for human use and hence the idea. However, I am unable to do so because of improper materials (for example: I wanted to use a cylindrical container made of glass but instead had to make it out of a plastic sheet) and lack of expert help.
Since the last two years, I have noticed that the Google Science Fair winners did their work in the field of medicine (both in cancer researches). I too study Biology. However, I'm unable to find any expert help in my area and decided to drop it out. However my dilemma remained: what project idea should I choose - on physics or biology? Awaiting for a quick reply. Thank you.

ishanmitra wrote:what project idea should I choose - on physics or biology?

We really can't help you with that question. You have to be passionate about whatever project you choose in order to put in the amount of effort it takes to do a project worthy of ranking high in the Google Science Fair. Only you can figure out what kind of a project will motivate you.

Thank you for your reply. However, what I would like to know is that whatever project I may be doing, I'm not getting any advanced expert: is it possible to get help online?
I wish to explain my physics project that I have first thought of submitting to Google Fair in a more detailed manner: The aim is to make a 3D projector (as I had mentioned in my previous post) that will be more of human use (just the way how touchscreen gadgets came into daily use). Its first prototype, uses lasers, that is not suitable for human use. My hypothesis was to create a more safer and practically more usable holographic projector by replacing the lasers with high-powered lights. The thing is I don't know whether this will actually work or not. I didn't find any help locally and decided to try make a prototype. However, I couldn't gather all the required equipments that I needed, for example, a high power flashlight. The project came to a sudden halt.
For the biology project, I wish to research upon a topic that can improve in various fields such as agriculture, health, sanitation, etc. However, I cannot find any expert in local areas so as to conduct any research, and hence cannot select any topic.
I would be glad if you could suggest something about it.