Too late to break into big consulting

You'll be behind your peers but it isn't too late if you plan smart and work hard

You don't need to optimize around getting a good internship for next summer -- you should be optimizing around getting a good FT offer

This means getting to a strong well-rounded resume by the beginning of senior year. What I would do, in no particular order since they're all pretty important:

1. Grades: Get a good GPA. Since SMU isn't a target school for many of the good firms, the higher the better. Keep in mind that the GPA that matters for full time recruitment next fall will be the GPA after 2 semesters, so you won't have an opportunity to play catchup
2. Work experience: Get good corp experience / internship. You probably won't be competitive for good consulting internships this summer assuming resume is fairly barren, but you can probably pursue some sort of other decent F500 finance or other good big brand name internship that recruits on campus. Also look for mid-semester internships if you can balance them in spring -- fill that gap on your resume
3. Leadership: Find a way to show initiative / leadership outside the classroom. Leadership roles in clubs are a common way to do this, but since you'll be fresh to campus that might be hard. I'd come up with a charitable type initiative you run yourself that demonstrates (a) impact and (b) problem-solving ability
4. Networking & prep: Join campus consulting club to learn about and prep for recruitment opportunities, figure out which firms recruit from campus and attend their events to get to know them, learn about the consulting industry to figure out which firms you want to target, etc.

Plenty of folks have gotten good jobs after transferring from community college to a 4-year. If you can pull it off you'll make out like a bandit from saving 2 years of more expensive college costs. As additional optionality, TBH if you botch getting a good internship this year then I'd also consider delaying graduation a semester so that you can have an additional summer to build good internship experience (bonus points if you do something like work a full time junior spring internship instead of taking classes, that way you're not spending a ton of extra money)