userseven Liquid soap works as long as you mix it with water. The ratio depends on the viscosity of the soap, will have to try several and see what ratio generates the most "healthy" foam. At a minimum you should put 1 part soap to 1 part water but in reality better effects are achieved with 1 part soap and 2 parts water or even 1 to 3. I have machines from other brands that have measurement markings on the reservoir for 1 part soap to 4 parts water. So you have to do a little bit of experimentation yourself. Don't use soap that has flakes mixed in, no matter how small these particles are. It will mess up your unit. As a general rule if after you add water the liquid soap separates and stuff accumulates on the bottom in the next couple of days then you should throw out and don't use it anymore in any foaming machine. Go for soap that even if it's colored it's also clear and see-through for best and safest results.

userseven Myprinter was delivered with a .4 mm nozzle installed and a spare.

userseven I don't think anyone knows how many lumens it emits but the unit is surprisingly capable as a camping light source. It would definitely light up a tent or a small table but it's not a search light.

userseven Youare supplied with a small "sample" filament. I felt it's more that enough for a few sample prints (benchies, chep cubes) to make sure the printer is ok but you better order some spools of filament in case you want to start printing a lot once the printer is up and running.