Method CO asking for advice

[meatballlover]

Hello, Im new here. I think you get this very often and i hate to intrude but if anybody can provide some advice i would really appreciate it. In advance i'm going to say i did read the entire CO megathread but there is still some stuff i wasn't sure about. I'm going to dump bellow all the things i am not sure about/open to advice.
-Are disposable charcoal grills fine to use? From what i've read they contain around half a kilo of charcoal and they are easy to use. If the answer is no then this could be adapted but it could save me money and effort. Once again if the answer is no please suggest alternatives.
-I seemed to encounter most suggestions being either a tent or a car. I dont own a car and with a tent i worry some air could escape. My idea though is a small bathtub in my place that i would seal, most likely with some plastic sheeting/anything that will effectively airtighten it. For my purpose i would be using 3 disposable charcoal grills in around 1 square meter of room (inside bathtub). Is this possible or should i avoid this? If the answer is no, please suggest how to airtight a tent or other option.
-from what i've seen opinions are divided if its better to let the CO build up before entering or entering with the coal. I plan to enter with the charcoal, the only thing i worry about is if maybe the possible headaches or dizzyness could trigger SI? I could surely handle a headache or dizzyness but what if my body fights and tries to get out of the space?
-I live with my mom but i would obviously choose a time when nobody is home. I also live with two pets. My worry is, could the CO from the bathtub escape and poison somebody else? I would surely put a warning sign on the bathroom door, and open windows everywhere else. Is it realistic i might affect others or am i overthinking?
-thats about it. Any extra advice about this method?

I Thank in advance to any useful response.

 

[Groundhog_Day]

-Disposable bbq's can work, but i think good quality briquettes or lumpwood charcoal are better options, and recommended in the megathread. I've bought 4kg Weber briquettes, as Zanexx succeeded with these, and i plan to follow the same timings, so using the same brand seemed best.

-I'm no expert, but the plastic sheeting/bath sounds dangerous to me. Zanexx used a Malawi 2 Regatta pop up tent. The most important factor is it being a single layer tent, and probably having waterproof rating 3000 hydrostatic head. Zanexx used canvas tape and plastic bags to cover the air vents inside the tent. I've bought Gorilla tape, as it said on the packaging that it can be used on tents. I tested it, and it does stick, but not extremely well, and i'm a bit worried if it's too damp or cold, it might not hold well enough. But, i'm planning to choose a day with good weather - low wind, dry, not freezing cold.

-Zanexx succeeded by entering the tent with the charcoal. But, importantly they had benzos to help sedate and overcome anxiety and panic. I haven't been able to get benzos, therefore, letting the CO build up first, and passing out much quicker, is probably the better option for me now.

Zanexx's goodbye thread - https://sanctionedsuicide.site/threads/leaving-tonight.3163/