i can switch out my freewheel to a fixed cog correct??

If you have a single cog freewheel, sort of...

You'll need to remove the freewheel and thread on the cog, and then thread on a lockring on top of that. "Normal" fixie hubs have a left-threaded lock ring which absolutely prevent the cog from unthreading when you apply backpressure on the pedals. You can make do with a right-hand threaded lockring, but the cog has to be on very tight first, then the lockring has to be on very tight after it. If everything isn't really tight, you stand the chance of unthreading the cog when you backpedal. If backpedaling is your only form of brakes, you could find yourself without brakes when you most need them.

If this all sounds too complicated, consider getting a rear wheel specifically set up for fixed-gear use.

I See, well i just got a new Winsor Clockwork and im trying to convert it for me first fixie. I hope it is an easy conversion and a SAFE one, i do plan on going "brakeless". Could I just get new hub thats fixed?

https://www.bikesdirect.com/products/...k_org_gallery/

In this link would i be able to add a new track cog to this hub? sorry im such a newbie lol BUT i have to start somewhere!?!?!

I don't know what happened to my previous post but if you want to run brakeless on the street then safety is obviously not a major concern.

Since you don't seem to have a lot of experience riding fixed, you should really ride around with at least one brake first just to get the hang of things.

The Windsor Clockwork has a flip flop hub so just take out the wheel and install the cog+lockring on the side that doesn't have anything on it. Enjoy.

Hey this may be another silly cog question. But i'm changing im ride from a 48/17 to a 48/18. do i need to change my chain out? or can i still use the one i road on with the 48/17?

Should be fine with the same chain.

This depends on where exactly your axle is situated right now, and the length of the dropout in either direction.