Edit: Just realized you said Monday and not just Easter. See last paragraph.
East or west? I75 (or 301) to Turnpike to 429 is best. No traffic until you hit the parking gates. From I95 to I4, your only concerns are backups around the outlet mall and other theme park exits.
As an I4 bypass, look into getting on the north end of 417 (toll) and the south end dumps you right into Disney. It's a big detour but is easy and keeps you moving. Deeper into Orlando, you can take the 408 (toll) to the Turnpike north a few miles to 429 then back down into Disney. I4 construction should be halted, but check here for updates and lane closures that can cause tieups:
http://i4ultimate.com/. Your best bet is to have a copilot with a live traffic map that can help you adjust to current craziness.
Since Monday is not a public school holiday, state holiday, or anything other than a normal work day for most businesses add:
For I75, light delays around Gainesville/Ocala during rush hour.
For 301, traffic will slow through the old speed trap towns. Warning: Lawtey and Starke still have their own PDs. Waldo and Hampton PD were disbanded, but county mounties are still doing strict traps on occasion. Watch out for poorly marked school zones.
For Turnpike, possible minor slow downs due to two lanes and heavy traffic, but no major on/off points til you hit the 429. 429 is open sailing to Disney.
For I95, expect major delays in Jacksonville from 6:30-9:30. Try to get updates or use GPS with traffic, but taking the western half of the 295 beltway is usually best.
For I4, Orlando will be hell from 6:30-10:00 both in the northern business half and in tourist town. Avoid at all costs using info above.