There are some reasons (almost) no one starts out all-grain brewing. Think of all-grain brewing as a marathon, and you're not a runner. You need to train before you run a marathon. I'd do a few kits first to get the basics down. Then do some extract+specialty grain recipes. I wouldn't do all-grain until you can master those other methods.
Sorry I totally disagree with this.
The number 1 reason most people do not start off with all grain is because they are scared of it. Then once they buy all the equipment for extract brewing, they spend a bunch more converting over to AG. Then wonder WHY they didn't do that to begin with.
AG brewing can be as complex or as simple as you want it to be, the basic skills needed to brew a first batch are all here on this forum, will it be a prize winning, brew world altering beer, probably not, but it will be beer.
Ultimately, it comes down to each individual, do you want to spend a little and dabble a bit to see if its a hobby that you might be interested?
Are you a dive in head first and get all kinds of stuff, and brew AG, and get all top notch stuff just because you are that way?
Are you in to building a lot of things on your own, a DIY person?
Many different aspects to this hobby, with no right or wrong way, but there is no ladder of knowledge that must be climbed in a specific order.