Hello everyone, I've been interested in cycling for around 2 years now and I'm looking for advice. I'm fourteen so money is tight but I have a Mountain Bike and a BMX both of them aren't a flash make the BMX is from Decathlon and the Mountain Bike from JJB but I've really took an interested in Singlespeed/fixed gear bikes recently and I'm looking to mash parts from the two bikes to create a good all around single speed bike the only problem is the front forks have suspension and I want to have drop down handle bars, will this make much difference? I was thinking of road tyres too.

I really want to know what you people think I should do.
Cheers

Steve