Choose your colors (or colortheres nothing wrong with playing a monocolor deck!), then select a good all-around commander that matches those colors
Finally, Squirreled Away also does a great job of spreading the card types out so a new player can understand how each one works
When Richard Garfield introduced typal effects in Limited Edition (Alpha) , they affected all the creatures on the battlefield
In a 1v1 match it might be more balanced like the Tui and La depict, but at a 4-player commander table, it's usually quite worth it for you to pay the cumulative upkeep for a couple of turns
New cards like 'Aerith Gainsborough' that get's stronger when you gain life but then disperses her +1/+1 counters to her teammates when she dies or with 'Gilgamesh, Master-at-Arms' who let's you draw a bunch of cards and freely play any equipment cards onto the battlefield (too bad the card doesn't also play 'Battle on the Big Bridge' track)
One can make creatures effectively unblockable by supplying protection and altering colors, and opponents' removal can be made useless in the same way