I have used an iterative approach to ease new people into more advanced tactics in the past.
In my experience, this route can allow people to intuit their character's bread-and-butter tactics reasonably well and shows them why and how we use advanced tactics.
The order of steps I present information in is usually like this:
1. Recovery: Become incredibly familiar with your character's recovery. Learn every character specific trick there may be, as well as range, speed, and how to stall/delay if you can. Learn to recover both high and low. If your character can sweet spot, practice and master that.
2. Dash Dancing: Dashdancing is a core skill that is not very technical, but very powerful. Learn exactly when your character's dash turns into a run, so you know exactly how far you can dash and still turn around. Learn to down-cancel a run into a smash or whatever other option you may need. Become acquainted with and practice using Jump-Cancelled grabs (they're quite easy to execute) out of dash.
3. Ledgeguarding: Learn about basic ledge mechanics. Learn how to drop > Jump > Attack back onto the stage. Learn how to drop > jump > ledgeguard away from the stage. Learn about sweet-spots and ledge techs. Become familiar with ledgehogs, how long your roll-on occupies the ledge, and when you become vulnerable again. Learn when to get-up attack, when to stand up, and when to roll-on.
4. Directional Influence: Learn what DI is and how best to DI when you're on and off-stage. Learn about smash DI, survival DI, situational DI, and bad DI and be able to identify situations where all of these either occur or are necessary. Wakeup mechanics (I think of it as roll DI, lol) are also covered in this step, as well as grab DI and ledge/wall techs.
5. L-Cancelling: Learn to use L-cancels to shorten your landing lag. The best way to learn L-cancel timing is through rote practice (that is, practicing it over and over until you have the timing in muscle memory). This is something you should keep practicing, L-cancelling can be a lot harder to do reliably than many people think. Learn that hitting a tilt-shield, light-shield, power shield, full-shield, no shield will alter your L-cancel timing. Also learn about auto-cancelled aerials.
6. Wave Landing: Learn how to smoothly land out of an empty jump or finished jump attack to keep your landing from being completely predictable. This segues well into wave dashing and also covers waveland onto stage.
7. Wave Dashing: Building on the waveland timing established in the previous step learn how different waveland angles make different wavedash lengths. Learn how to wavedash out of shield and how to use wavedashes to augment dash-dancing, bait grabs/attacks, gain positional advantage, and maneuver quickly around the stage.
Around step 4 or 5 most people understand enough of the basics to start looking into character specific advice on the sub forums.
After all of this stuff almost everyone seems to be able to pick up most other stuff on their own. The basics seem to "click" at different times for people, but until they do this is a pretty good framework to go on.