I didn't have a "low" freshman GPA, but it was my lowest semester of undergrad. I finished first semester with a 3.5, which really scared me. I thought, if I can't even get A's in freshman classes, I will never make it (dramatic, I know, but it's what I thought lol). Freshman year I studied A LOT, but just did it the wrong way. Note-cards for everything. 100% rote memorization for everything. It didn't work. I memorized a bunch, but understood nothing.
Huge turnaround sophomore year. I took A&P, Physics, and Orgo all at the same time. I studied every day for about 5-6ish hours, but never studied the night before tests. I still did a bunch of note-cards, but I read a lot more. Orgo was the first text book I actually read cover to cover. I watched a lot of youtube videos to get concepts down. Went to my profs for more help. I made sure I understood everything, and it made all the difference! I got a 4.0 both semesters my sophomore year, and ended up graduating with a 3.89!
Good luck!