32/17 with 700c wheels is 50 gear inches. That's very easy to pedal, possibly too easy? I run 44/17 which is 69 gear inches and that is considered pretty easy, so yeah 50 is not going to have very much top speed. It should be very easy to skid with though (if you can build up some speed first).

New tires can make skidding difficult at first, in my experience. At least it seemed that way. But maybe it wasn't the tire getting "broken in" that made it easier for me to skid, but rather improvement in my technique.

As far as pedals/straps, that's a very personal choice. I like bmx pedals with straps. Most people here seem to prefer clipless (shoes that connect to your pedals via a cleat). And some others prefer clips. I think straps are a wise choice if skids are your primary objective.

and yes like ianjk said above, for safety's sake - get a proper cog and lockring. They cost very little. Much cheaper than your ambulance ride will be if you keep using the DIY "cog".
If you insist on the 32T chainring, you may want to buy a 15T fixed cog. That'll give you 57 gear inches (32/15) and still give you enough skid patches to get the job done.