Freshman Connection(FC) is an OPTION for anyone admitted for spring, so it’s important to note that it is NOT automatic. Spring admission just means you are eligible for FC, not that you are enrolled in it.
If you want to do this awesome program (FC), you must sign up for it and note that “Enrollment is on a first-come, first-served basis.” See details here https://oes.umd.edu/incoming-current-visiting-students/freshmen-connection/enroll-freshmen-connection
Some spring admits opt to do the fall as a semester abroad https://globalmaryland.umd.edu/offices/freshmen-abroad-semester-programs-spring-admitted-maryland-students.
And, finally, some spring admits just use the opportunity to work a few months to build up some cash reserves to help pay expenses.
However you slice it, spring admission is still an admission (yay!), so you should celebrate it!