I live in MA and its about 20 degrees here now. Kinda windy and freezing but I still want to fly!

I've gone a few times and I've been the only one at the field. A few times I was unable to even start the plane. Now I leave the plane inside overnight to keep warm and start it in the driveway to make sure it will be ok. Now even if it starts it won't run right. It will idle and I can creep up the throttle and let it run to warm up. No matter how long I let it warm up it will not transition off idle. Any small blip in the throttle and it stalls out.

I'm a total noob so I need needle advice. I ran the plane all summer and it ran great. I need help setting the needles for cold weather. There's one needle external (high speed top end needle) and one on the side of the carb which I assume is the low speed needle that I need to adjust.

Can anyone point me to a good thread or walkthrough to set the mixtures right?

Also I need to know some tricks to start the engine. Normally it will not start unless I pinch the exhaust tube for a while during cranking over. I see guys blocking the carb intake and then giving the prop a spin with no glow ignitor, then starting by hand and it works. For me I drain the battery on my starter and it takes over 30 seconds to get the engine to start every time

Engine is an OS 46FX

Thanks
Tony