I had to learn quickly so that I could teach this, so although this might not be "ideal" (whatever that might mean), here's how I progressed. It might possibly be instructive.
1. Munton's Export Stout kit. All LME, dry yeast.
2. Brewer's Best Witbier kit. LME, DME, steeping grains, spice/sachet, dry yeast.
3. Blonde ale extract recipe from a friend. LME, DME, steeping grains, dry yeast, but not in a kit so I had more choices over exactly how to accomplish things.
4. Oktoberfest ale partial mash. DME + BIAB, liquid yeast, more choices to make.
5. Dunkelweizen all grain. BIAB, Schmitz decoction mash, liquid yeast.
And I've done all all-grain since then, always BIAB (I only brew 3 gallons at a time). Sometimes Schmitz decoction, sometimes step-mash, sometimes simple infusion mash. Mostly I use liquid yeast, and for big beers sometimes I make a simple starter.
That being said, the owner of my LHBS started brewing all-grain when he was 14, and has since decided that all-extract all-dry-yeast is fine with him.
It's not rocket science (which is pretty easy, and brewing is even easier than that). Nobody can say that what you're doing is wrong, although many will be happy to tell you that what you're doing won't taste very good (and many of these people are frequently right), but no matter what happens, it will be beer, and it will be yours.