It's hard to say without knowing exactly what classes you're talking about. Both the hardest and easiest classes I have ever taken were both online classes. IRL college classes vary just as much--some are incredibly difficult while others are a breeze.
However, now that your classes are in-person, the most life-changing advice I can give you is to take advantage of the in-person format by going to your professor's office hours to ask questions or clarify class material. Professors that see you often will remember your name/face and see from your presence that you are dedicated and are working hard to do well in their class. This can make the difference between a failing grade vs. a passing grade. Additionally, if you get to know the professor well, that's a future recommendation letter for scholarships/jobs/graduate schools as well.