Welcome,
And congrats on the purchase of a great razor!

Concerning strops, you'll see basically two recommendations. One is to purchase an inexpensive strop. Given the number of newbies who accidentally nick their strop right off the bat, an inexpensive strop means less $$$ wasted. I don't know of any inexpensive 3" strops, so the newbie who purchases an inexpensive (narrow) stop will also need to learn a proper X-stroke when stropping.

The other recommendation is to purchase a more expensive 3" strop right off the bat. Then the newbie only needs to make straight strokes and can dispense with learning how to do proper X-strokes on the strop.

Whichever path you choose, think about what you're doing each time you bring your razor to your strop. Take it slow. Don't try to strop with speed as you see in many of the videos. Strop slowly and develop good stropping technique first. Whip the razor fast while you're still learning and you risk mistakes like using too much pressure and lifting the spine off the strop, both of which will round over the edge, dulling the razor and you won't get a good shave until the razor is sent out for re-honing.
Namaste,
Morty -_-