The Svea is often cantankerous to light off until you get the hang of it. I have the little optional plunger to pressurize the tank, but also an eye dropper to take a bit of fuel from the tank and deposit it in the well beneath the burner. Light off the open fuel in the well and the heat pressurized the tank.
The easiest by far has been that little Coleman burner with folding pot supports that I can just screw onto a propane cylinder and I’m in business. The small cylinder will last for several days if used for just cooking simple meals. But it doesn’t put out the energy as do liquid fueled stoves or even biomass, which is a consideration for higher elevations. Here, elevations are seldom above 4K feet.