Hi! Surbhi. I am as lost as you are. I too just completed the Google Analytics Professional Certificate.
Right now everything seems so hard. The projects on Kaggle and queries here as well are really intimidating. It looks like I am wasting my time. Things are so complex. But I read somewhere on Kaggle that the first 3-6 months are difficult. Things will get easier. I promise I will keep at it because I like playing with data and hope you do as well.
Anyway, I am using DataCamp to learn R. You can also use @EconomiCurtis's suggestion.
I hope you make great projects and land your dream job. Best of luck!