Starting college without a declared major is normal. Many students use the first year to explore before choosing. Academic advisors exist to help with exactly this process.
Advisors can explain degree requirements, suggest courses that keep options open, and point students toward career assessments and counseling services. They can also connect students with faculty, clubs, and internships that make abstract majors concrete.
A practical approach is to take general education courses while sampling one or two fields of interest each term. Informational interviews with professionals, job shadowing, and short internships give a clearer picture than catalogs alone. Note which classes hold your attention and which feel like a chore.
There is no single deadline that fits everyone, but delaying the decision too long can add cost if credits do not count toward the eventual major. An advisor can map out a timeline that balances exploration with progress toward graduation.
Changing majors later is common and not a failure. What matters is making the next choice with better information than the last one. See understanding admission requirements, master’s admission requirements and application tips, and balancing work and study.

