I know it sounds kinda silly but does anyone have an idea for turning a regular bike into a exercise bike so it won't move as im exercising, i want to get my fitness up a bit before i do go for a proper bike ride.
You can buy trainers that attach to your bike. They attach to the rear axle and use a wheel that runs off of the tire for resistance. They work very well and the most common are the magnetic resistance and the fluid resistance. I have a Bell Motivator and it works ok but I need more resistance then it provides. The fluid ones provide more resistance and are a little quieter.
You need something to place under the front wheel to level the bike ( anything will work )
A slick tire on the rear will help it run smoother and quieter.