You don't need "know it alls" to explain the law to you, but you do need them to explain how to remove a plastic plug from a cooker inlet so you can continue with your ILLEGAL gas work. I would consult an up to date registered gas safe engineer!
To undertake any gas work you must be competent. This is the law!!
Competency does not simply mean you have the physical ability to do the job. It means you must have the ability to be able to test (from the meter) for the correct gas pressure both before and after any installation. This will indicate leaks either through pipework or faulty appliances. If you do not have the ability to do this then any gas work you undertake has the potential to be both unsafe and illegal.
A general rule here is that if you need to ask questions about an installation you are about to undertake then you should not be undertaking it.
If anyone is unsure about any aspect of any part of a job involving gas then please leave it to a gas safe professional.
If anything at all goes wrong with any gas installation undertaken by a person who is not competent then it is extremely unlikely that your home insurance will be valid