Don't go in deep unless you feel ready.
That layout is beginning to get the idea for digital racing.
Do you already have a lot of Scaley Sport track? If so, when your table is ready, just set up a layout. Drive it a bit and decide where you'd like to change lanes.
If you get the new digital 6 car base, you can use it for analog cars as well. Stick with straight lane changers for the most part. They're more versatile and useful, but more expensive too.
If you've never tried digital, you might find that it's quite different in many ways, as many ways as it's similar to analog, really.
Your pit lane is clever, but if you want to put any buildings next to it, you won't be able to see your cars.
Are you planning to elevate the back straight at all?
Also, it looks like you're taking the track right to the edges of your table. Even magnet cars need some room to tail out once in a while, and magless is just as fun for digital as analog when the lane changers are places appropriately.
Is there any reason most of your turns are constant radius? Since you have a lot of stock of varying size, it's nice to smooth out the turns with larger radii entry and exit. R4321 then back with 1234 is a fun, smooth turn. There's also a great thread in the Tracks and Scenery section called "Show me your curves" with a lot of examples of great turns created with sectional track.