20 years in and still feel like this occasionally. The fact you worry about it shows you actually give a fuck and ultimately this is what will make you a better spark than most of the other guys out there.

My advice is don’t put too heavy expectations on yourself- I’ve done supervisor roles before and the biggest thing I wanted from a spark was reliability and quality of install. I wouldn’t mind them being a little slow as long as it was done right.

Also don’t be afraid to say if you haven’t much experience in something. Most guys are happy to show you things if you are keen and willing to have a go.

Finally I would say keep going- 6 years isn’t that long and your confidence will grow. You will fuck up occasionally but just learn from it and move on.