Smells like something is burning when turning on fan mostly when turning on heat. Also makes a gurgling noise. Can hear it and smell from interior of van

Make model and year of vehicle.

Sounds like you have a head gasket problem, as it gets worse it will leak oil and coolant on the exhaust manifold giving you the burning smell, I would suggest you get that changed as soon as you can, going too long can and will cause very large very expensive issues and possibly destroy the car.

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let car run and make sure both fans are working .if not it might be over heating and burning off antifreeze this happened to my wifes car .i fixed a fan that wasn't working and this stop the smell

Yeah.
Pine needles get into the heater box and clog the heater fan motor's "fan".
You also may have rodents in there,making nests.
The wife was smart to turn off the heater fan B-4 the fuse blew.

It appears your fan itself burned out. When a field coil of an electrical fan burns out it usually makes a lot of smoke. The noise could be something that fell in there that stopped the fan from turning freely. I can imagine it heated up under the strain and burned out.

When you restarted it was burnt out so hence no noise and no fan.
The smell of the smoke should also be clue. Electrical field coils burning has an awful soury type of smell.

Check the fan on broken blades - even a small part missing can cause unusual sounds. If parts are new / serviced - smell can be due to labels getting hot and emitting slight burning smell. Classic are exhaust pipes with partnumber labels left on there. If he smell stays, something in the interior might come from a crash car which was partly burned.

First double check the coolant level, the gurgling noise is probably from an air lock created when refilled. Check by removing the rad cap, not just reservoir level. Top up coolant level if needed, the noise should go away shortly. The coolant smell is most likely from doing the job itself. If it wasn't drained properly, some coolant will spill onto or even into the exhaust system. When it heats it will smell like coolant until burned off. The hum noise I'm not sure, alternators create more of a whine noise. It could also be from spilling coolant on the serpentine belt, it may squeal for a while afterwards. A good technician will always, drain coolant fully first, and should shampoo the engine after the job to eliminate any mess they created. If any of the noises continue, or the coolant is still low after a few days, return it to the garage for further diagnosis.

Replace the fan the bearing is going and makes the fan wobble and that is why you get the noise.

yes power steering is most likely very low , repair leak , as the fluid is flameable

yes,could be something in there rubbing against fan cage.