Welcome aboard @Jkroland
We can get kettle size etc sorted in two seconds* but before that, you mentioned, "twang."
"Twang," caused me to stop brewing many times in the past and I was about to give up again about 12 years ago until someone sent me a PM explaining my problem was "extract twang." It was an amazing PM (private message) for many reasons. I won't go into those here. In this post I think that all is needed is to say that "Extract twang," is a real thing and you will not get it in all-grain.
There is a brewery near me that brews with extract. The beers they brew are exquisite. But, they are getting their extract fresh all the time. Two other extract beers I've had were amongst the best beers I have ever had. I'll describe one... this beer was a supremely beautiful lager. A lager, and I've written on this before, can be hugely astonishing. It sounds weird that a lager could blow your palate apart as much as an IPA but, it can.
It gets more entertaining though. This perfect lager (and, I'm telling you it was the perfect lager) was not only fermented at summer temperatures (in Perth, that means about 35°C), this lager actually came from a can/kit that said IPA!
Hope you didn't mind the yarn above kroland. What you actually asked (the kettle size stuff and grain bag) is really important though and I'd advise posting a new thread on that question.
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